./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:14:45,137 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:14:45,139 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:14:45,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:14:45,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:14:45,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:14:45,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:14:45,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:14:45,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:14:45,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:14:45,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:14:45,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:14:45,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:14:45,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:14:45,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:14:45,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:14:45,207 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:14:45,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:14:45,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:14:45,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:14:45,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:14:45,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:14:45,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:14:45,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:14:45,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:14:45,245 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:14:45,246 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:14:45,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:14:45,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:14:45,251 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:14:45,252 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:14:45,253 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:14:45,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:14:45,257 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:14:45,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:14:45,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:14:45,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:14:45,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:14:45,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:14:45,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:14:45,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:14:45,264 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:14:45,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:14:45,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:14:45,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:14:45,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:14:45,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:14:45,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:14:45,329 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:14:45,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:14:45,330 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:14:45,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:14:45,332 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:14:45,332 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:14:45,332 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:14:45,333 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:14:45,333 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:14:45,333 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:14:45,333 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:14:45,334 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:14:45,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:14:45,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:14:45,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:14:45,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:14:45,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:14:45,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:14:45,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:14:45,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:14:45,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:14:45,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:14:45,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:14:45,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:45,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:14:45,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:14:45,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:14:45,342 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:14:45,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:14:45,343 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:14:45,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:14:45,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:14:45,343 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_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 36ffbabf76f0a0e87302d8b80308134217d4fdef380ae154dfcdec710817c6e2 [2021-11-20 23:14:45,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:14:45,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:14:45,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:14:45,702 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:14:45,703 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:14:45,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-20 23:14:45,793 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/data/26dd8bda6/35a42cb5a834426aa855b073fd9cc4cc/FLAGe2ca0345f [2021-11-20 23:14:46,858 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:14:46,859 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-20 23:14:46,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/data/26dd8bda6/35a42cb5a834426aa855b073fd9cc4cc/FLAGe2ca0345f [2021-11-20 23:14:47,224 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/data/26dd8bda6/35a42cb5a834426aa855b073fd9cc4cc [2021-11-20 23:14:47,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:14:47,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:14:47,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:47,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:14:47,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:14:47,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:47" (1/1) ... [2021-11-20 23:14:47,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24340c9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:47, skipping insertion in model container [2021-11-20 23:14:47,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:14:47" (1/1) ... [2021-11-20 23:14:47,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:14:47,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:14:48,121 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-20 23:14:48,123 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-20 23:14:48,675 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_f4e0f490-386b-4e04-914e-e36e34483f1e/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-20 23:14:49,922 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:49,992 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:14:50,131 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3834] [2021-11-20 23:14:50,131 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3835-3836] [2021-11-20 23:14:50,146 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_f4e0f490-386b-4e04-914e-e36e34483f1e/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[119274,119287] [2021-11-20 23:14:50,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:14:50,598 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:14:50,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50 WrapperNode [2021-11-20 23:14:50,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:14:50,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:50,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:14:50,601 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:14:50,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:50,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,020 INFO L137 Inliner]: procedures = 264, calls = 3505, calls flagged for inlining = 131, calls inlined = 111, statements flattened = 6309 [2021-11-20 23:14:51,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:14:51,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:14:51,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:14:51,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:14:51,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:14:51,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:14:51,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:14:51,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:14:51,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (1/1) ... [2021-11-20 23:14:51,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:14:51,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:14:51,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:14:51,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:14:51,680 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-20 23:14:51,681 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-20 23:14:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-20 23:14:51,681 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-20 23:14:51,681 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-20 23:14:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-20 23:14:51,682 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-20 23:14:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-20 23:14:51,682 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-20 23:14:51,682 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-20 23:14:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:14:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:14:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:14:51,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:14:51,683 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-20 23:14:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-20 23:14:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-20 23:14:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-20 23:14:51,684 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-20 23:14:51,684 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-20 23:14:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-20 23:14:51,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-20 23:14:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:14:51,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:14:51,685 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-20 23:14:51,686 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-20 23:14:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-20 23:14:51,686 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-20 23:14:51,686 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-20 23:14:51,687 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-20 23:14:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-20 23:14:51,687 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-20 23:14:51,687 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-20 23:14:51,688 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-20 23:14:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 23:14:51,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 23:14:51,688 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-20 23:14:51,689 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-20 23:14:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-20 23:14:51,689 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-20 23:14:51,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:14:51,690 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:14:51,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:14:51,690 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:14:51,691 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 23:14:51,692 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 23:14:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-20 23:14:51,693 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-20 23:14:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-20 23:14:51,693 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-20 23:14:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-20 23:14:51,694 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-20 23:14:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:14:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-20 23:14:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-20 23:14:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-20 23:14:51,696 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-20 23:14:51,696 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-20 23:14:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-20 23:14:51,697 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-20 23:14:51,697 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:14:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-20 23:14:51,698 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-20 23:14:51,698 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-20 23:14:51,698 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-20 23:14:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-20 23:14:51,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-20 23:14:51,699 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 23:14:51,700 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 23:14:51,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:14:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:14:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-20 23:14:51,701 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-20 23:14:51,701 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-20 23:14:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-20 23:14:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-20 23:14:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-20 23:14:51,702 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-20 23:14:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-20 23:14:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-20 23:14:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-20 23:14:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-20 23:14:51,704 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-20 23:14:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2021-11-20 23:14:51,705 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2021-11-20 23:14:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-20 23:14:51,706 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-20 23:14:51,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:14:51,708 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-20 23:14:51,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-20 23:14:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-20 23:14:51,709 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-20 23:14:51,709 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-20 23:14:51,709 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-20 23:14:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 23:14:51,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 23:14:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:14:51,710 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-20 23:14:51,710 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-20 23:14:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:14:51,711 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-20 23:14:51,711 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-20 23:14:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-20 23:14:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-20 23:14:51,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:14:51,712 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:14:51,713 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-20 23:14:51,714 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-20 23:14:51,717 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-20 23:14:51,718 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-20 23:14:51,718 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-20 23:14:51,718 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-20 23:14:51,720 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:14:51,721 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:14:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-20 23:14:51,722 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-20 23:14:51,722 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 23:14:51,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 23:14:51,728 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-20 23:14:51,728 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-20 23:14:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-20 23:14:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-20 23:14:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-20 23:14:51,729 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-20 23:14:51,729 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:14:51,730 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:14:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:14:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-20 23:14:51,730 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-20 23:14:51,730 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-20 23:14:51,731 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-20 23:14:51,731 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-20 23:14:51,731 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-20 23:14:51,731 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-20 23:14:51,731 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-20 23:14:51,732 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-20 23:14:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-20 23:14:51,732 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:14:51,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:14:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-20 23:14:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-20 23:14:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-20 23:14:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-20 23:14:51,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:14:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:14:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:14:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-20 23:14:51,734 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-11-20 23:14:51,734 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-11-20 23:14:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-20 23:14:51,735 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-20 23:14:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-20 23:14:51,735 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-20 23:14:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_dtr_rts [2021-11-20 23:14:51,736 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_dtr_rts [2021-11-20 23:14:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-20 23:14:51,736 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-20 23:14:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-20 23:14:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-20 23:14:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-20 23:14:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-20 23:14:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-20 23:14:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-20 23:14:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-20 23:14:51,738 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-20 23:14:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-20 23:14:51,738 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-20 23:14:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-20 23:14:51,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-20 23:14:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-20 23:14:51,739 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-20 23:14:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:14:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-20 23:14:51,740 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-20 23:14:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-20 23:14:51,740 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-20 23:14:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-20 23:14:51,740 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-20 23:14:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:14:51,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:14:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-20 23:14:51,743 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-20 23:14:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-20 23:14:51,744 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-20 23:14:52,741 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:14:52,747 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:14:53,066 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:15:06,389 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:15:07,522 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:15:07,522 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:15:07,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:07 BoogieIcfgContainer [2021-11-20 23:15:07,529 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:15:07,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:15:07,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:15:07,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:15:07,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:14:47" (1/3) ... [2021-11-20 23:15:07,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ef2b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:07, skipping insertion in model container [2021-11-20 23:15:07,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:14:50" (2/3) ... [2021-11-20 23:15:07,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52ef2b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:15:07, skipping insertion in model container [2021-11-20 23:15:07,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:15:07" (3/3) ... [2021-11-20 23:15:07,547 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-20 23:15:07,554 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:15:07,554 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:15:07,644 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:15:07,657 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:15:07,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:15:07,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 1097 states, 684 states have (on average 1.355263157894737) internal successors, (927), 699 states have internal predecessors, (927), 330 states have call successors, (330), 82 states have call predecessors, (330), 81 states have return successors, (322), 322 states have call predecessors, (322), 322 states have call successors, (322) [2021-11-20 23:15:07,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 23:15:07,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:07,780 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:07,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:07,792 INFO L85 PathProgramCache]: Analyzing trace with hash -2111348066, now seen corresponding path program 1 times [2021-11-20 23:15:07,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:07,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026684956] [2021-11-20 23:15:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:07,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:08,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-20 23:15:09,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:09,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026684956] [2021-11-20 23:15:09,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026684956] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:09,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:09,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:15:09,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813229882] [2021-11-20 23:15:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:09,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:09,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:09,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:09,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:09,118 INFO L87 Difference]: Start difference. First operand has 1097 states, 684 states have (on average 1.355263157894737) internal successors, (927), 699 states have internal predecessors, (927), 330 states have call successors, (330), 82 states have call predecessors, (330), 81 states have return successors, (322), 322 states have call predecessors, (322), 322 states have call successors, (322) Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:15:12,328 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:14,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:17,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:18,525 INFO L93 Difference]: Finished difference Result 2954 states and 4271 transitions. [2021-11-20 23:15:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:15:18,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 122 [2021-11-20 23:15:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:18,571 INFO L225 Difference]: With dead ends: 2954 [2021-11-20 23:15:18,571 INFO L226 Difference]: Without dead ends: 1855 [2021-11-20 23:15:18,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:18,593 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1153 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1155 SdHoareTripleChecker+Valid, 2888 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:18,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1155 Valid, 2888 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 429 Invalid, 3 Unknown, 0 Unchecked, 9.1s Time] [2021-11-20 23:15:18,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-20 23:15:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1843. [2021-11-20 23:15:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1181 states have (on average 1.3564775613886537) internal successors, (1602), 1190 states have internal predecessors, (1602), 515 states have call successors, (515), 147 states have call predecessors, (515), 146 states have return successors, (516), 513 states have call predecessors, (516), 514 states have call successors, (516) [2021-11-20 23:15:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2633 transitions. [2021-11-20 23:15:18,848 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2633 transitions. Word has length 122 [2021-11-20 23:15:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:18,850 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2633 transitions. [2021-11-20 23:15:18,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 23:15:18,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2633 transitions. [2021-11-20 23:15:18,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-20 23:15:18,863 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:18,864 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:18,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:15:18,864 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1201111069, now seen corresponding path program 1 times [2021-11-20 23:15:18,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:18,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182420017] [2021-11-20 23:15:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:18,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-20 23:15:19,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:19,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182420017] [2021-11-20 23:15:19,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182420017] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:19,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:19,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:15:19,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922718260] [2021-11-20 23:15:19,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:19,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:19,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:19,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:19,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:19,301 INFO L87 Difference]: Start difference. First operand 1843 states and 2633 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:15:21,856 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:25,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:26,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:26,694 INFO L93 Difference]: Finished difference Result 4600 states and 6531 transitions. [2021-11-20 23:15:26,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:15:26,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 122 [2021-11-20 23:15:26,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:26,724 INFO L225 Difference]: With dead ends: 4600 [2021-11-20 23:15:26,724 INFO L226 Difference]: Without dead ends: 2796 [2021-11-20 23:15:26,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:26,736 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 793 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 2814 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:26,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 2814 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 515 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 23:15:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2796 states. [2021-11-20 23:15:27,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2796 to 2784. [2021-11-20 23:15:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 1794 states have (on average 1.3561872909698998) internal successors, (2433), 1808 states have internal predecessors, (2433), 753 states have call successors, (753), 237 states have call predecessors, (753), 236 states have return successors, (754), 750 states have call predecessors, (754), 752 states have call successors, (754) [2021-11-20 23:15:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 3940 transitions. [2021-11-20 23:15:27,082 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 3940 transitions. Word has length 122 [2021-11-20 23:15:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:27,083 INFO L470 AbstractCegarLoop]: Abstraction has 2784 states and 3940 transitions. [2021-11-20 23:15:27,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:15:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 3940 transitions. [2021-11-20 23:15:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 23:15:27,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:27,091 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:27,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:15:27,092 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:27,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash 515213616, now seen corresponding path program 1 times [2021-11-20 23:15:27,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:27,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709044778] [2021-11-20 23:15:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:27,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-20 23:15:27,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:27,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709044778] [2021-11-20 23:15:27,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709044778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:27,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:27,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:15:27,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617803951] [2021-11-20 23:15:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:27,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:27,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:27,572 INFO L87 Difference]: Start difference. First operand 2784 states and 3940 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:15:29,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:33,666 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:35,043 INFO L93 Difference]: Finished difference Result 6917 states and 9763 transitions. [2021-11-20 23:15:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:15:35,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 125 [2021-11-20 23:15:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:35,079 INFO L225 Difference]: With dead ends: 6917 [2021-11-20 23:15:35,080 INFO L226 Difference]: Without dead ends: 4175 [2021-11-20 23:15:35,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:35,098 INFO L933 BasicCegarLoop]: 1949 mSDtfsCounter, 878 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 3235 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:35,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 3235 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 502 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-11-20 23:15:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2021-11-20 23:15:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 4172. [2021-11-20 23:15:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4172 states, 2713 states have (on average 1.3601179506081829) internal successors, (3690), 2733 states have internal predecessors, (3690), 1092 states have call successors, (1092), 367 states have call predecessors, (1092), 366 states have return successors, (1095), 1087 states have call predecessors, (1095), 1091 states have call successors, (1095) [2021-11-20 23:15:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4172 states to 4172 states and 5877 transitions. [2021-11-20 23:15:35,366 INFO L78 Accepts]: Start accepts. Automaton has 4172 states and 5877 transitions. Word has length 125 [2021-11-20 23:15:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:35,367 INFO L470 AbstractCegarLoop]: Abstraction has 4172 states and 5877 transitions. [2021-11-20 23:15:35,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 23:15:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 4172 states and 5877 transitions. [2021-11-20 23:15:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-20 23:15:35,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:35,379 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:35,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:15:35,379 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2033489700, now seen corresponding path program 1 times [2021-11-20 23:15:35,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:35,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458635420] [2021-11-20 23:15:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:35,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-11-20 23:15:35,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458635420] [2021-11-20 23:15:35,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458635420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:35,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:35,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:15:35,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406883952] [2021-11-20 23:15:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:35,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:35,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:35,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:35,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:35,778 INFO L87 Difference]: Start difference. First operand 4172 states and 5877 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:15:38,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:41,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:41,870 INFO L93 Difference]: Finished difference Result 8304 states and 11696 transitions. [2021-11-20 23:15:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:15:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 154 [2021-11-20 23:15:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:41,903 INFO L225 Difference]: With dead ends: 8304 [2021-11-20 23:15:41,903 INFO L226 Difference]: Without dead ends: 4166 [2021-11-20 23:15:41,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:41,920 INFO L933 BasicCegarLoop]: 1346 mSDtfsCounter, 0 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2688 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:41,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2688 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-20 23:15:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-11-20 23:15:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 4150. [2021-11-20 23:15:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4150 states, 2691 states have (on average 1.3586027499070978) internal successors, (3656), 2715 states have internal predecessors, (3656), 1092 states have call successors, (1092), 367 states have call predecessors, (1092), 366 states have return successors, (1095), 1083 states have call predecessors, (1095), 1091 states have call successors, (1095) [2021-11-20 23:15:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4150 states to 4150 states and 5843 transitions. [2021-11-20 23:15:42,109 INFO L78 Accepts]: Start accepts. Automaton has 4150 states and 5843 transitions. Word has length 154 [2021-11-20 23:15:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:42,111 INFO L470 AbstractCegarLoop]: Abstraction has 4150 states and 5843 transitions. [2021-11-20 23:15:42,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 23:15:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 4150 states and 5843 transitions. [2021-11-20 23:15:42,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 23:15:42,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:42,120 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:42,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:15:42,121 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:42,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash -957493876, now seen corresponding path program 1 times [2021-11-20 23:15:42,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:42,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049901895] [2021-11-20 23:15:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:42,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:42,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2021-11-20 23:15:42,497 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:42,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049901895] [2021-11-20 23:15:42,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049901895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:42,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:42,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:15:42,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915126516] [2021-11-20 23:15:42,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:42,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:15:42,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:15:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:15:42,502 INFO L87 Difference]: Start difference. First operand 4150 states and 5843 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:15:45,422 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:48,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:50,056 INFO L93 Difference]: Finished difference Result 8227 states and 11581 transitions. [2021-11-20 23:15:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:15:50,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 167 [2021-11-20 23:15:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:50,090 INFO L225 Difference]: With dead ends: 8227 [2021-11-20 23:15:50,090 INFO L226 Difference]: Without dead ends: 4111 [2021-11-20 23:15:50,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:15:50,106 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1 mSDsluCounter, 3086 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4025 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:50,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 4025 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 618 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-11-20 23:15:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2021-11-20 23:15:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4105. [2021-11-20 23:15:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4105 states, 2663 states have (on average 1.359744648892227) internal successors, (3621), 2688 states have internal predecessors, (3621), 1078 states have call successors, (1078), 364 states have call predecessors, (1078), 363 states have return successors, (1081), 1068 states have call predecessors, (1081), 1077 states have call successors, (1081) [2021-11-20 23:15:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4105 states to 4105 states and 5780 transitions. [2021-11-20 23:15:50,384 INFO L78 Accepts]: Start accepts. Automaton has 4105 states and 5780 transitions. Word has length 167 [2021-11-20 23:15:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:50,385 INFO L470 AbstractCegarLoop]: Abstraction has 4105 states and 5780 transitions. [2021-11-20 23:15:50,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 23:15:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4105 states and 5780 transitions. [2021-11-20 23:15:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 23:15:50,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:50,393 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:50,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:15:50,394 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2039937406, now seen corresponding path program 1 times [2021-11-20 23:15:50,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:50,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300365215] [2021-11-20 23:15:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:50,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-20 23:15:50,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:50,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300365215] [2021-11-20 23:15:50,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300365215] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:50,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:50,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:15:50,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11656142] [2021-11-20 23:15:50,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:50,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:50,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:50,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:50,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:50,784 INFO L87 Difference]: Start difference. First operand 4105 states and 5780 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 23:15:53,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:55,656 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:15:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:15:57,191 INFO L93 Difference]: Finished difference Result 7190 states and 10185 transitions. [2021-11-20 23:15:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:15:57,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 172 [2021-11-20 23:15:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:15:57,247 INFO L225 Difference]: With dead ends: 7190 [2021-11-20 23:15:57,248 INFO L226 Difference]: Without dead ends: 7187 [2021-11-20 23:15:57,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:57,253 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1141 mSDsluCounter, 1361 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:15:57,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 2744 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-20 23:15:57,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2021-11-20 23:15:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 7062. [2021-11-20 23:15:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7062 states, 4656 states have (on average 1.3743556701030928) internal successors, (6399), 4714 states have internal predecessors, (6399), 1776 states have call successors, (1776), 634 states have call predecessors, (1776), 629 states have return successors, (1799), 1737 states have call predecessors, (1799), 1775 states have call successors, (1799) [2021-11-20 23:15:57,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7062 states to 7062 states and 9974 transitions. [2021-11-20 23:15:57,612 INFO L78 Accepts]: Start accepts. Automaton has 7062 states and 9974 transitions. Word has length 172 [2021-11-20 23:15:57,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:15:57,613 INFO L470 AbstractCegarLoop]: Abstraction has 7062 states and 9974 transitions. [2021-11-20 23:15:57,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 23:15:57,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7062 states and 9974 transitions. [2021-11-20 23:15:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-20 23:15:57,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:15:57,625 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:15:57,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:15:57,625 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:15:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:15:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1129700409, now seen corresponding path program 1 times [2021-11-20 23:15:57,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:15:57,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720474273] [2021-11-20 23:15:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:15:57,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:15:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:15:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-11-20 23:15:57,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:15:57,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720474273] [2021-11-20 23:15:57,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720474273] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:15:57,949 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:15:57,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:15:57,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350030298] [2021-11-20 23:15:57,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:15:57,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:15:57,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:57,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:15:57,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:15:57,951 INFO L87 Difference]: Start difference. First operand 7062 states and 9974 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 23:16:00,550 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:03,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:05,124 INFO L93 Difference]: Finished difference Result 18191 states and 25677 transitions. [2021-11-20 23:16:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 172 [2021-11-20 23:16:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:05,195 INFO L225 Difference]: With dead ends: 18191 [2021-11-20 23:16:05,196 INFO L226 Difference]: Without dead ends: 11171 [2021-11-20 23:16:05,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:05,228 INFO L933 BasicCegarLoop]: 1719 mSDtfsCounter, 1108 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:05,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 2949 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 531 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2021-11-20 23:16:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11171 states. [2021-11-20 23:16:05,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11171 to 11144. [2021-11-20 23:16:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11144 states, 7414 states have (on average 1.3601294847585648) internal successors, (10084), 7506 states have internal predecessors, (10084), 2708 states have call successors, (2708), 1028 states have call predecessors, (2708), 1021 states have return successors, (2731), 2647 states have call predecessors, (2731), 2707 states have call successors, (2731) [2021-11-20 23:16:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 15523 transitions. [2021-11-20 23:16:05,748 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 15523 transitions. Word has length 172 [2021-11-20 23:16:05,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:05,749 INFO L470 AbstractCegarLoop]: Abstraction has 11144 states and 15523 transitions. [2021-11-20 23:16:05,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-20 23:16:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 15523 transitions. [2021-11-20 23:16:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 23:16:05,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:05,762 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:05,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:16:05,762 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash -18045561, now seen corresponding path program 1 times [2021-11-20 23:16:05,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:05,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149159084] [2021-11-20 23:16:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:05,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-11-20 23:16:06,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:06,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149159084] [2021-11-20 23:16:06,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149159084] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:06,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:06,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:16:06,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008928276] [2021-11-20 23:16:06,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:06,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:06,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:06,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:06,102 INFO L87 Difference]: Start difference. First operand 11144 states and 15523 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:16:08,537 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:11,866 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:12,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:12,862 INFO L93 Difference]: Finished difference Result 26091 states and 36276 transitions. [2021-11-20 23:16:12,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:12,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 185 [2021-11-20 23:16:12,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:12,941 INFO L225 Difference]: With dead ends: 26091 [2021-11-20 23:16:12,941 INFO L226 Difference]: Without dead ends: 14989 [2021-11-20 23:16:12,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:16:12,982 INFO L933 BasicCegarLoop]: 1500 mSDtfsCounter, 860 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 2784 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:12,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 2784 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 422 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-20 23:16:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2021-11-20 23:16:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 14907. [2021-11-20 23:16:13,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14907 states, 9950 states have (on average 1.359396984924623) internal successors, (13526), 10068 states have internal predecessors, (13526), 3566 states have call successors, (3566), 1397 states have call predecessors, (3566), 1390 states have return successors, (3601), 3489 states have call predecessors, (3601), 3565 states have call successors, (3601) [2021-11-20 23:16:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14907 states to 14907 states and 20693 transitions. [2021-11-20 23:16:13,784 INFO L78 Accepts]: Start accepts. Automaton has 14907 states and 20693 transitions. Word has length 185 [2021-11-20 23:16:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:13,788 INFO L470 AbstractCegarLoop]: Abstraction has 14907 states and 20693 transitions. [2021-11-20 23:16:13,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:16:13,789 INFO L276 IsEmpty]: Start isEmpty. Operand 14907 states and 20693 transitions. [2021-11-20 23:16:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-20 23:16:13,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:13,807 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:13,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:16:13,807 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:13,809 INFO L85 PathProgramCache]: Analyzing trace with hash 993444047, now seen corresponding path program 1 times [2021-11-20 23:16:13,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:13,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698487463] [2021-11-20 23:16:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:13,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:14,192 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-20 23:16:14,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:14,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698487463] [2021-11-20 23:16:14,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698487463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:14,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826728267] [2021-11-20 23:16:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:14,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:14,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:14,200 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:14,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:16:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:15,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 5444 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 23:16:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-11-20 23:16:16,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:16:16,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826728267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:16,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:16:16,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-20 23:16:16,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444793804] [2021-11-20 23:16:16,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:16,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:16:16,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:16:16,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:16,039 INFO L87 Difference]: Start difference. First operand 14907 states and 20693 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 23:16:18,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:21,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:23,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:23,185 INFO L93 Difference]: Finished difference Result 33894 states and 47031 transitions. [2021-11-20 23:16:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:16:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 182 [2021-11-20 23:16:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:23,298 INFO L225 Difference]: With dead ends: 33894 [2021-11-20 23:16:23,298 INFO L226 Difference]: Without dead ends: 19029 [2021-11-20 23:16:23,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:23,352 INFO L933 BasicCegarLoop]: 1962 mSDtfsCounter, 1070 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 3085 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:23,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 3085 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 477 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-11-20 23:16:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19029 states. [2021-11-20 23:16:24,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19029 to 18937. [2021-11-20 23:16:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18937 states, 12720 states have (on average 1.3607704402515723) internal successors, (17309), 12867 states have internal predecessors, (17309), 4432 states have call successors, (4432), 1791 states have call predecessors, (4432), 1784 states have return successors, (4479), 4336 states have call predecessors, (4479), 4431 states have call successors, (4479) [2021-11-20 23:16:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18937 states to 18937 states and 26220 transitions. [2021-11-20 23:16:24,476 INFO L78 Accepts]: Start accepts. Automaton has 18937 states and 26220 transitions. Word has length 182 [2021-11-20 23:16:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:24,477 INFO L470 AbstractCegarLoop]: Abstraction has 18937 states and 26220 transitions. [2021-11-20 23:16:24,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2021-11-20 23:16:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 18937 states and 26220 transitions. [2021-11-20 23:16:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-20 23:16:24,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:24,505 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:24,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:24,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 23:16:24,724 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash -561458646, now seen corresponding path program 1 times [2021-11-20 23:16:24,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:24,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171486761] [2021-11-20 23:16:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:24,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-11-20 23:16:25,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:25,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171486761] [2021-11-20 23:16:25,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171486761] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:25,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:25,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 23:16:25,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394732872] [2021-11-20 23:16:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:25,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 23:16:25,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 23:16:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 23:16:25,623 INFO L87 Difference]: Start difference. First operand 18937 states and 26220 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 23:16:28,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:31,564 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:35,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:38,052 INFO L93 Difference]: Finished difference Result 38102 states and 52772 transitions. [2021-11-20 23:16:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:16:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) Word has length 188 [2021-11-20 23:16:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:38,137 INFO L225 Difference]: With dead ends: 38102 [2021-11-20 23:16:38,138 INFO L226 Difference]: Without dead ends: 19066 [2021-11-20 23:16:38,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:16:38,185 INFO L933 BasicCegarLoop]: 1358 mSDtfsCounter, 157 mSDsluCounter, 6170 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 6728 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:38,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 6728 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1018 Invalid, 3 Unknown, 0 Unchecked, 11.8s Time] [2021-11-20 23:16:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19066 states. [2021-11-20 23:16:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19066 to 18610. [2021-11-20 23:16:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18610 states, 12497 states have (on average 1.3590461710810595) internal successors, (16984), 12670 states have internal predecessors, (16984), 4344 states have call successors, (4344), 1746 states have call predecessors, (4344), 1768 states have return successors, (4437), 4251 states have call predecessors, (4437), 4343 states have call successors, (4437) [2021-11-20 23:16:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18610 states to 18610 states and 25765 transitions. [2021-11-20 23:16:39,177 INFO L78 Accepts]: Start accepts. Automaton has 18610 states and 25765 transitions. Word has length 188 [2021-11-20 23:16:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:39,178 INFO L470 AbstractCegarLoop]: Abstraction has 18610 states and 25765 transitions. [2021-11-20 23:16:39,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 3 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (25), 4 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-20 23:16:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 18610 states and 25765 transitions. [2021-11-20 23:16:39,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-20 23:16:39,206 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:39,207 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:39,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:16:39,207 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:39,208 INFO L85 PathProgramCache]: Analyzing trace with hash -959589141, now seen corresponding path program 1 times [2021-11-20 23:16:39,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:39,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205299441] [2021-11-20 23:16:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:39,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2021-11-20 23:16:39,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205299441] [2021-11-20 23:16:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205299441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:39,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:16:39,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:16:39,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400770617] [2021-11-20 23:16:39,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:39,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:16:39,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:16:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:16:39,970 INFO L87 Difference]: Start difference. First operand 18610 states and 25765 transitions. Second operand has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 23:16:42,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:46,401 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:47,878 INFO L93 Difference]: Finished difference Result 37245 states and 51603 transitions. [2021-11-20 23:16:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:16:47,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 202 [2021-11-20 23:16:47,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:47,959 INFO L225 Difference]: With dead ends: 37245 [2021-11-20 23:16:47,959 INFO L226 Difference]: Without dead ends: 18675 [2021-11-20 23:16:48,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:16:48,003 INFO L933 BasicCegarLoop]: 1341 mSDtfsCounter, 4 mSDsluCounter, 3079 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4016 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:48,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4016 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 626 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2021-11-20 23:16:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18675 states. [2021-11-20 23:16:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18675 to 18611. [2021-11-20 23:16:48,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18611 states, 12498 states have (on average 1.3590174427908466) internal successors, (16985), 12671 states have internal predecessors, (16985), 4344 states have call successors, (4344), 1746 states have call predecessors, (4344), 1768 states have return successors, (4437), 4251 states have call predecessors, (4437), 4343 states have call successors, (4437) [2021-11-20 23:16:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18611 states to 18611 states and 25766 transitions. [2021-11-20 23:16:48,880 INFO L78 Accepts]: Start accepts. Automaton has 18611 states and 25766 transitions. Word has length 202 [2021-11-20 23:16:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:48,881 INFO L470 AbstractCegarLoop]: Abstraction has 18611 states and 25766 transitions. [2021-11-20 23:16:48,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 26.666666666666668) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 23:16:48,881 INFO L276 IsEmpty]: Start isEmpty. Operand 18611 states and 25766 transitions. [2021-11-20 23:16:48,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-20 23:16:48,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:48,909 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:48,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 23:16:48,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:48,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:48,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1524014619, now seen corresponding path program 1 times [2021-11-20 23:16:48,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:48,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156523394] [2021-11-20 23:16:48,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:48,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2021-11-20 23:16:49,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156523394] [2021-11-20 23:16:49,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156523394] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:49,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727220160] [2021-11-20 23:16:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:49,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:49,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:49,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:49,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:16:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 5565 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:16:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-11-20 23:16:51,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:16:51,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727220160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:16:51,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:16:51,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-20 23:16:51,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698058633] [2021-11-20 23:16:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:16:51,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:16:51,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:16:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:16:51,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-20 23:16:51,516 INFO L87 Difference]: Start difference. First operand 18611 states and 25766 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:16:54,100 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:16:58,559 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:17:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:00,634 INFO L93 Difference]: Finished difference Result 33773 states and 46778 transitions. [2021-11-20 23:17:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 23:17:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 203 [2021-11-20 23:17:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:00,700 INFO L225 Difference]: With dead ends: 33773 [2021-11-20 23:17:00,700 INFO L226 Difference]: Without dead ends: 15229 [2021-11-20 23:17:00,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 23:17:00,750 INFO L933 BasicCegarLoop]: 1341 mSDtfsCounter, 5 mSDsluCounter, 4618 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5353 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:00,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 5353 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 825 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-11-20 23:17:00,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15229 states. [2021-11-20 23:17:01,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15229 to 15223. [2021-11-20 23:17:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15223 states, 10224 states have (on average 1.3607198748043818) internal successors, (13912), 10373 states have internal predecessors, (13912), 3560 states have call successors, (3560), 1418 states have call predecessors, (3560), 1438 states have return successors, (3639), 3479 states have call predecessors, (3639), 3559 states have call successors, (3639) [2021-11-20 23:17:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15223 states to 15223 states and 21111 transitions. [2021-11-20 23:17:01,500 INFO L78 Accepts]: Start accepts. Automaton has 15223 states and 21111 transitions. Word has length 203 [2021-11-20 23:17:01,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:01,501 INFO L470 AbstractCegarLoop]: Abstraction has 15223 states and 21111 transitions. [2021-11-20 23:17:01,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-20 23:17:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 15223 states and 21111 transitions. [2021-11-20 23:17:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-20 23:17:01,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:01,523 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:01,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:01,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:01,739 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash 449536441, now seen corresponding path program 1 times [2021-11-20 23:17:01,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040404299] [2021-11-20 23:17:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:01,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2021-11-20 23:17:02,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:02,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040404299] [2021-11-20 23:17:02,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040404299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:02,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848613771] [2021-11-20 23:17:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:02,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:02,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:02,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:02,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4e0f490-386b-4e04-914e-e36e34483f1e/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:17:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:06,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 5655 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 23:17:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 224 proven. 1 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2021-11-20 23:17:07,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 638 trivial. 0 not checked. [2021-11-20 23:17:08,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848613771] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:17:08,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107386781] [2021-11-20 23:17:08,168 INFO L159 IcfgInterpreter]: Started Sifa with 118 locations of interest [2021-11-20 23:17:08,168 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:08,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:08,187 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:08,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:33,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-20 23:18:19,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-20 23:18:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:18:54,737 INFO L244 Elim1Store]: Index analysis took 1610 ms [2021-11-20 23:19:57,271 WARN L227 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 2480 DAG size of output: 1353 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-20 23:19:57,280 INFO L354 Elim1Store]: treesize reduction 4050, result has 33.3 percent of original size [2021-11-20 23:19:57,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 228 select indices, 228 select index equivalence classes, 25653 disjoint index pairs (out of 25878 index pairs), introduced 228 new quantified variables, introduced 450 case distinctions, treesize of input 1147 treesize of output 2725 [2021-11-20 23:21:56,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:21:56,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 226 select indices, 226 select index equivalence classes, 25651 disjoint index pairs (out of 25425 index pairs), introduced 226 new quantified variables, introduced 0 case distinctions, treesize of input 1137 treesize of output 1814