./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-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_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7 --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 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:26:14,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:26:14,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:26:14,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:26:14,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:26:14,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:26:14,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:26:14,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:26:14,279 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:26:14,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:26:14,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:26:14,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:26:14,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:26:14,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:26:14,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:26:14,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:26:14,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:26:14,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:26:14,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:26:14,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:26:14,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:26:14,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:26:14,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:26:14,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:26:14,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:26:14,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:26:14,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:26:14,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:26:14,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:26:14,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:26:14,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:26:14,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:26:14,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:26:14,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:26:14,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:26:14,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:26:14,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:26:14,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:26:14,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:26:14,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:26:14,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:26:14,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 20:26:14,422 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:26:14,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:26:14,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:26:14,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:26:14,434 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:26:14,434 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:26:14,435 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:26:14,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:26:14,435 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:26:14,436 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:26:14,437 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:26:14,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:26:14,438 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:26:14,438 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:26:14,438 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:26:14,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:26:14,439 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:26:14,439 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:26:14,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:26:14,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:26:14,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:26:14,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:26:14,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:26:14,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:26:14,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:26:14,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:26:14,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:26:14,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:26:14,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:26:14,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:26:14,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:26:14,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:26:14,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:26:14,447 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:26:14,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:26:14,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:26:14,448 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:26:14,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:26:14,448 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_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 234112184b071eb42f340136dfce6e1a552d788d086baea007a05a3140f2d157 [2021-11-25 20:26:14,773 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:26:14,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:26:14,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:26:14,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:26:14,803 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:26:14,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-25 20:26:14,884 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/data/561500abc/2c68eaf06b524c258dfe85ea18d97b89/FLAG511bb0e2d [2021-11-25 20:26:16,074 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:26:16,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-25 20:26:16,171 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/data/561500abc/2c68eaf06b524c258dfe85ea18d97b89/FLAG511bb0e2d [2021-11-25 20:26:16,381 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/data/561500abc/2c68eaf06b524c258dfe85ea18d97b89 [2021-11-25 20:26:16,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:26:16,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:26:16,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:26:16,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:26:16,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:26:16,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:26:16" (1/1) ... [2021-11-25 20:26:16,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d30fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:16, skipping insertion in model container [2021-11-25 20:26:16,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:26:16" (1/1) ... [2021-11-25 20:26:16,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:26:16,609 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:26:19,221 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_c4e71514-8a0c-410c-a437-c43616d09ffb/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-25 20:26:19,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:26:19,384 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:26:19,774 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_c4e71514-8a0c-410c-a437-c43616d09ffb/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[254896,254909] [2021-11-25 20:26:19,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:26:20,060 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:26:20,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20 WrapperNode [2021-11-25 20:26:20,060 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:26:20,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:26:20,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:26:20,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:26:20,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:20,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:20,672 INFO L137 Inliner]: procedures = 286, calls = 3678, calls flagged for inlining = 140, calls inlined = 119, statements flattened = 7836 [2021-11-25 20:26:20,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:26:20,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:26:20,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:26:20,675 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:26:20,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:20,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:20,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:20,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:21,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:21,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:21,142 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:21,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:26:21,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:26:21,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:26:21,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:26:21,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (1/1) ... [2021-11-25 20:26:21,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:26:21,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:26:21,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:26:21,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:26:21,400 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-25 20:26:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-25 20:26:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-25 20:26:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-25 20:26:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure __cmpxchg_wrong_size [2021-11-25 20:26:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-25 20:26:21,401 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-25 20:26:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-25 20:26:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 20:26:21,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 20:26:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 20:26:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 20:26:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 20:26:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 20:26:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-25 20:26:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-25 20:26:21,402 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-25 20:26:21,402 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-25 20:26:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-25 20:26:21,404 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-25 20:26:21,404 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-25 20:26:21,404 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-25 20:26:21,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-25 20:26:21,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-25 20:26:21,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 20:26:21,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 20:26:21,405 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-25 20:26:21,405 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-25 20:26:21,406 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2021-11-25 20:26:21,406 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2021-11-25 20:26:21,406 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-25 20:26:21,406 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-25 20:26:21,407 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 20:26:21,407 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 20:26:21,407 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-25 20:26:21,407 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-25 20:26:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 20:26:21,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 20:26:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-25 20:26:21,409 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-25 20:26:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-25 20:26:21,409 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-25 20:26:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 20:26:21,410 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 20:26:21,410 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 20:26:21,410 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 20:26:21,410 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-25 20:26:21,411 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-25 20:26:21,411 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-25 20:26:21,412 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-25 20:26:21,413 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-25 20:26:21,413 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-25 20:26:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-25 20:26:21,414 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-25 20:26:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:26:21,414 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 20:26:21,414 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 20:26:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-25 20:26:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-25 20:26:21,415 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-25 20:26:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-25 20:26:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-25 20:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-25 20:26:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-25 20:26:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-25 20:26:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-25 20:26:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-25 20:26:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-25 20:26:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-25 20:26:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-25 20:26:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-25 20:26:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-25 20:26:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure acm_softint [2021-11-25 20:26:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_softint [2021-11-25 20:26:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:26:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:26:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-25 20:26:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-25 20:26:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-25 20:26:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-25 20:26:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-25 20:26:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-25 20:26:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 20:26:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 20:26:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-25 20:26:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-25 20:26:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-25 20:26:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-25 20:26:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-25 20:26:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-25 20:26:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2021-11-25 20:26:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2021-11-25 20:26:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_from_anchor [2021-11-25 20:26:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_from_anchor [2021-11-25 20:26:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 20:26:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-25 20:26:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-25 20:26:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-25 20:26:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-25 20:26:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 20:26:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2021-11-25 20:26:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2021-11-25 20:26:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:26:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-25 20:26:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-25 20:26:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-25 20:26:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-25 20:26:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 20:26:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 20:26:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-25 20:26:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-25 20:26:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-25 20:26:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-25 20:26:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-25 20:26:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-25 20:26:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-25 20:26:21,440 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-25 20:26:21,440 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-25 20:26:21,440 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-25 20:26:21,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-25 20:26:21,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-25 20:26:21,446 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-25 20:26:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-25 20:26:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-25 20:26:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-25 20:26:21,447 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-25 20:26:21,447 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-25 20:26:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 20:26:21,448 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 20:26:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:26:21,448 INFO L130 BoogieDeclarations]: Found specification of procedure acm_set_control [2021-11-25 20:26:21,448 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_set_control [2021-11-25 20:26:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-25 20:26:21,449 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-25 20:26:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-25 20:26:21,449 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-25 20:26:21,449 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-25 20:26:21,449 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-25 20:26:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-25 20:26:21,450 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-25 20:26:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-25 20:26:21,450 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-25 20:26:21,450 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 20:26:21,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 20:26:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-25 20:26:21,451 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-25 20:26:21,451 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-25 20:26:21,451 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-25 20:26:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-25 20:26:21,452 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-25 20:26:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 20:26:21,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 20:26:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:26:21,452 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 20:26:21,453 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 20:26:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:26:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:26:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 20:26:21,453 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-25 20:26:21,454 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-25 20:26:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_dtr_rts [2021-11-25 20:26:21,454 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_dtr_rts [2021-11-25 20:26:21,454 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-25 20:26:21,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-25 20:26:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-25 20:26:21,455 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-25 20:26:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-25 20:26:21,455 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-25 20:26:21,455 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-25 20:26:21,456 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-25 20:26:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-25 20:26:21,456 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-25 20:26:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-25 20:26:21,456 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-25 20:26:21,456 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-25 20:26:21,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-25 20:26:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-25 20:26:21,457 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-25 20:26:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:26:21,457 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-25 20:26:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-25 20:26:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-25 20:26:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-25 20:26:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-25 20:26:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-25 20:26:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:26:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:26:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-25 20:26:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-25 20:26:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-25 20:26:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-25 20:26:22,386 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:26:22,398 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:26:22,662 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 20:26:38,949 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:26:39,968 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:26:39,969 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 20:26:39,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:26:39 BoogieIcfgContainer [2021-11-25 20:26:39,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:26:39,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:26:39,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:26:39,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:26:39,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:26:16" (1/3) ... [2021-11-25 20:26:39,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba33b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:26:39, skipping insertion in model container [2021-11-25 20:26:39,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:26:20" (2/3) ... [2021-11-25 20:26:39,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ba33b4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:26:39, skipping insertion in model container [2021-11-25 20:26:39,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:26:39" (3/3) ... [2021-11-25 20:26:39,983 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-25 20:26:39,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:26:39,989 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:26:40,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:26:40,072 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 [2021-11-25 20:26:40,072 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:26:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 1151 states, 721 states have (on average 1.3564493758668517) internal successors, (978), 737 states have internal predecessors, (978), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) [2021-11-25 20:26:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-11-25 20:26:40,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:40,174 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 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] [2021-11-25 20:26:40,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:26:40,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:40,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1543876468, now seen corresponding path program 1 times [2021-11-25 20:26:40,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:40,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983822852] [2021-11-25 20:26:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:40,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1110 trivial. 0 not checked. [2021-11-25 20:26:42,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:42,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983822852] [2021-11-25 20:26:42,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983822852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:26:42,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:26:42,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:26:42,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247427449] [2021-11-25 20:26:42,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:26:42,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:26:42,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:26:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:26:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:26:42,155 INFO L87 Difference]: Start difference. First operand has 1151 states, 721 states have (on average 1.3564493758668517) internal successors, (978), 737 states have internal predecessors, (978), 343 states have call successors, (343), 86 states have call predecessors, (343), 85 states have return successors, (334), 334 states have call predecessors, (334), 334 states have call successors, (334) Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:26:44,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:26:46,847 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:26:49,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:26:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:50,437 INFO L93 Difference]: Finished difference Result 2892 states and 4177 transitions. [2021-11-25 20:26:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:26:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 282 [2021-11-25 20:26:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:50,508 INFO L225 Difference]: With dead ends: 2892 [2021-11-25 20:26:50,508 INFO L226 Difference]: Without dead ends: 1759 [2021-11-25 20:26:50,520 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 [2021-11-25 20:26:50,523 INFO L933 BasicCegarLoop]: 1607 mSDtfsCounter, 904 mSDsluCounter, 1621 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:50,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [904 Valid, 3026 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 440 Invalid, 3 Unknown, 0 Unchecked, 8.1s Time] [2021-11-25 20:26:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-11-25 20:26:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1756. [2021-11-25 20:26:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1128 states have (on average 1.3537234042553192) internal successors, (1527), 1135 states have internal predecessors, (1527), 489 states have call successors, (489), 139 states have call predecessors, (489), 138 states have return successors, (488), 488 states have call predecessors, (488), 488 states have call successors, (488) [2021-11-25 20:26:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2504 transitions. [2021-11-25 20:26:50,729 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2504 transitions. Word has length 282 [2021-11-25 20:26:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:50,737 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 2504 transitions. [2021-11-25 20:26:50,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-25 20:26:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2504 transitions. [2021-11-25 20:26:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-25 20:26:50,750 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:50,750 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:50,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:26:50,751 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:26:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:50,754 INFO L85 PathProgramCache]: Analyzing trace with hash 926679960, now seen corresponding path program 1 times [2021-11-25 20:26:50,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775152806] [2021-11-25 20:26:50,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:50,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1106 trivial. 0 not checked. [2021-11-25 20:26:52,126 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:52,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775152806] [2021-11-25 20:26:52,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775152806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:26:52,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:26:52,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:26:52,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555844189] [2021-11-25 20:26:52,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:26:52,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:26:52,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:26:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:26:52,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:26:52,131 INFO L87 Difference]: Start difference. First operand 1756 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:26:54,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:26:56,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:26:58,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:01,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:02,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:02,674 INFO L93 Difference]: Finished difference Result 4789 states and 6806 transitions. [2021-11-25 20:27:02,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:27:02,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 274 [2021-11-25 20:27:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:02,702 INFO L225 Difference]: With dead ends: 4789 [2021-11-25 20:27:02,702 INFO L226 Difference]: Without dead ends: 3082 [2021-11-25 20:27:02,710 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 [2021-11-25 20:27:02,712 INFO L933 BasicCegarLoop]: 1895 mSDtfsCounter, 1129 mSDsluCounter, 1599 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:02,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1131 Valid, 3294 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 500 Invalid, 4 Unknown, 0 Unchecked, 10.4s Time] [2021-11-25 20:27:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3082 states. [2021-11-25 20:27:02,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3082 to 3067. [2021-11-25 20:27:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3067 states, 2001 states have (on average 1.3673163418290855) internal successors, (2736), 2017 states have internal predecessors, (2736), 808 states have call successors, (808), 258 states have call predecessors, (808), 257 states have return successors, (811), 803 states have call predecessors, (811), 807 states have call successors, (811) [2021-11-25 20:27:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 4355 transitions. [2021-11-25 20:27:03,006 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 4355 transitions. Word has length 274 [2021-11-25 20:27:03,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:03,008 INFO L470 AbstractCegarLoop]: Abstraction has 3067 states and 4355 transitions. [2021-11-25 20:27:03,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-25 20:27:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 4355 transitions. [2021-11-25 20:27:03,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-25 20:27:03,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:03,015 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:03,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:27:03,015 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash 535553693, now seen corresponding path program 1 times [2021-11-25 20:27:03,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:03,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367123704] [2021-11-25 20:27:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:03,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1106 trivial. 0 not checked. [2021-11-25 20:27:03,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:03,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367123704] [2021-11-25 20:27:03,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367123704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:03,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:03,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:27:03,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615038575] [2021-11-25 20:27:03,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:03,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:03,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:03,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:03,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:03,899 INFO L87 Difference]: Start difference. First operand 3067 states and 4355 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:27:06,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:08,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:11,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:12,732 INFO L93 Difference]: Finished difference Result 7459 states and 10546 transitions. [2021-11-25 20:27:12,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:27:12,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 274 [2021-11-25 20:27:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:12,766 INFO L225 Difference]: With dead ends: 7459 [2021-11-25 20:27:12,767 INFO L226 Difference]: Without dead ends: 4441 [2021-11-25 20:27:12,780 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 [2021-11-25 20:27:12,781 INFO L933 BasicCegarLoop]: 1834 mSDtfsCounter, 792 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 3168 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:12,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 3168 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 563 Invalid, 3 Unknown, 0 Unchecked, 8.6s Time] [2021-11-25 20:27:12,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2021-11-25 20:27:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 4430. [2021-11-25 20:27:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 2917 states have (on average 1.3681864929722318) internal successors, (3991), 2937 states have internal predecessors, (3991), 1126 states have call successors, (1126), 387 states have call predecessors, (1126), 386 states have return successors, (1129), 1121 states have call predecessors, (1129), 1125 states have call successors, (1129) [2021-11-25 20:27:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6246 transitions. [2021-11-25 20:27:12,983 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6246 transitions. Word has length 274 [2021-11-25 20:27:12,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:12,984 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 6246 transitions. [2021-11-25 20:27:12,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-25 20:27:12,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6246 transitions. [2021-11-25 20:27:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2021-11-25 20:27:12,997 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:12,997 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:12,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:27:12,998 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:12,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1680721713, now seen corresponding path program 1 times [2021-11-25 20:27:12,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:12,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286268331] [2021-11-25 20:27:12,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:12,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1110 trivial. 0 not checked. [2021-11-25 20:27:14,658 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286268331] [2021-11-25 20:27:14,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286268331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:14,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:27:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353125260] [2021-11-25 20:27:14,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:14,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:14,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:14,663 INFO L87 Difference]: Start difference. First operand 4430 states and 6246 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:27:16,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:18,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:21,154 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:23,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:24,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:24,974 INFO L93 Difference]: Finished difference Result 12951 states and 18254 transitions. [2021-11-25 20:27:24,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:27:24,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 317 [2021-11-25 20:27:24,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:25,037 INFO L225 Difference]: With dead ends: 12951 [2021-11-25 20:27:25,037 INFO L226 Difference]: Without dead ends: 8570 [2021-11-25 20:27:25,056 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 [2021-11-25 20:27:25,057 INFO L933 BasicCegarLoop]: 1764 mSDtfsCounter, 1281 mSDsluCounter, 1608 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1283 SdHoareTripleChecker+Valid, 3169 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:25,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1283 Valid, 3169 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 4 Unknown, 0 Unchecked, 10.1s Time] [2021-11-25 20:27:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8570 states. [2021-11-25 20:27:25,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8570 to 7170. [2021-11-25 20:27:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 4725 states have (on average 1.3733333333333333) internal successors, (6489), 4767 states have internal predecessors, (6489), 1819 states have call successors, (1819), 626 states have call predecessors, (1819), 625 states have return successors, (1830), 1802 states have call predecessors, (1830), 1818 states have call successors, (1830) [2021-11-25 20:27:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 10138 transitions. [2021-11-25 20:27:25,579 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 10138 transitions. Word has length 317 [2021-11-25 20:27:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:25,580 INFO L470 AbstractCegarLoop]: Abstraction has 7170 states and 10138 transitions. [2021-11-25 20:27:25,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:27:25,582 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 10138 transitions. [2021-11-25 20:27:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-11-25 20:27:25,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:25,596 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:25,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:27:25,597 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:25,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:25,599 INFO L85 PathProgramCache]: Analyzing trace with hash 206056687, now seen corresponding path program 1 times [2021-11-25 20:27:25,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:25,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065421634] [2021-11-25 20:27:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:25,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2021-11-25 20:27:26,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065421634] [2021-11-25 20:27:26,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065421634] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:26,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:26,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:27:26,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319492489] [2021-11-25 20:27:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:26,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:27:26,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:27:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:27:26,427 INFO L87 Difference]: Start difference. First operand 7170 states and 10138 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:27:28,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:30,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:34,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:35,527 INFO L93 Difference]: Finished difference Result 14254 states and 20161 transitions. [2021-11-25 20:27:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:27:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 334 [2021-11-25 20:27:35,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:35,585 INFO L225 Difference]: With dead ends: 14254 [2021-11-25 20:27:35,585 INFO L226 Difference]: Without dead ends: 7125 [2021-11-25 20:27:35,612 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 [2021-11-25 20:27:35,614 INFO L933 BasicCegarLoop]: 1414 mSDtfsCounter, 1 mSDsluCounter, 3233 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4235 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:35,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 4235 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 627 Invalid, 3 Unknown, 0 Unchecked, 8.9s Time] [2021-11-25 20:27:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7125 states. [2021-11-25 20:27:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7125 to 5840. [2021-11-25 20:27:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5840 states, 3840 states have (on average 1.371875) internal successors, (5268), 3874 states have internal predecessors, (5268), 1495 states have call successors, (1495), 505 states have call predecessors, (1495), 504 states have return successors, (1502), 1481 states have call predecessors, (1502), 1494 states have call successors, (1502) [2021-11-25 20:27:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5840 states to 5840 states and 8265 transitions. [2021-11-25 20:27:36,016 INFO L78 Accepts]: Start accepts. Automaton has 5840 states and 8265 transitions. Word has length 334 [2021-11-25 20:27:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:36,017 INFO L470 AbstractCegarLoop]: Abstraction has 5840 states and 8265 transitions. [2021-11-25 20:27:36,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 2 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-25 20:27:36,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5840 states and 8265 transitions. [2021-11-25 20:27:36,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-11-25 20:27:36,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:36,038 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:36,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:27:36,038 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:36,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:36,040 INFO L85 PathProgramCache]: Analyzing trace with hash -746509651, now seen corresponding path program 1 times [2021-11-25 20:27:36,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446071946] [2021-11-25 20:27:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:36,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1403 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1403 trivial. 0 not checked. [2021-11-25 20:27:37,438 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:37,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446071946] [2021-11-25 20:27:37,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446071946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:37,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:37,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:27:37,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749096584] [2021-11-25 20:27:37,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:37,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:37,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:37,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:37,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:37,441 INFO L87 Difference]: Start difference. First operand 5840 states and 8265 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:27:39,565 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:41,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:44,913 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:45,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:45,932 INFO L93 Difference]: Finished difference Result 13132 states and 18558 transitions. [2021-11-25 20:27:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:27:45,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 341 [2021-11-25 20:27:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:45,974 INFO L225 Difference]: With dead ends: 13132 [2021-11-25 20:27:45,974 INFO L226 Difference]: Without dead ends: 7341 [2021-11-25 20:27:46,004 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 [2021-11-25 20:27:46,006 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 854 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 2974 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:46,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 2974 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 432 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2021-11-25 20:27:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2021-11-25 20:27:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 6976. [2021-11-25 20:27:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6976 states, 4594 states have (on average 1.3730953417501088) internal successors, (6308), 4635 states have internal predecessors, (6308), 1771 states have call successors, (1771), 610 states have call predecessors, (1771), 610 states have return successors, (1782), 1755 states have call predecessors, (1782), 1770 states have call successors, (1782) [2021-11-25 20:27:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6976 states to 6976 states and 9861 transitions. [2021-11-25 20:27:46,448 INFO L78 Accepts]: Start accepts. Automaton has 6976 states and 9861 transitions. Word has length 341 [2021-11-25 20:27:46,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:46,450 INFO L470 AbstractCegarLoop]: Abstraction has 6976 states and 9861 transitions. [2021-11-25 20:27:46,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-25 20:27:46,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6976 states and 9861 transitions. [2021-11-25 20:27:46,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-25 20:27:46,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:46,466 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:46,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:27:46,466 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1299538812, now seen corresponding path program 1 times [2021-11-25 20:27:46,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:46,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606432135] [2021-11-25 20:27:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:46,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2021-11-25 20:27:48,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:48,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606432135] [2021-11-25 20:27:48,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606432135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:48,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:48,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:27:48,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517924257] [2021-11-25 20:27:48,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:48,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:48,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:48,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:48,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:48,041 INFO L87 Difference]: Start difference. First operand 6976 states and 9861 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, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:27:50,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:52,245 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:55,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:27:55,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:27:55,779 INFO L93 Difference]: Finished difference Result 7241 states and 10143 transitions. [2021-11-25 20:27:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:27:55,780 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, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 339 [2021-11-25 20:27:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:27:55,812 INFO L225 Difference]: With dead ends: 7241 [2021-11-25 20:27:55,812 INFO L226 Difference]: Without dead ends: 7238 [2021-11-25 20:27:55,814 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 [2021-11-25 20:27:55,815 INFO L933 BasicCegarLoop]: 1428 mSDtfsCounter, 1428 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:27:55,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1428 Valid, 1563 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 234 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2021-11-25 20:27:55,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-11-25 20:27:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 7238. [2021-11-25 20:27:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7238 states, 4757 states have (on average 1.3678789152827413) internal successors, (6507), 4798 states have internal predecessors, (6507), 1806 states have call successors, (1806), 674 states have call predecessors, (1806), 674 states have return successors, (1817), 1790 states have call predecessors, (1817), 1805 states have call successors, (1817) [2021-11-25 20:27:56,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 10130 transitions. [2021-11-25 20:27:56,174 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 10130 transitions. Word has length 339 [2021-11-25 20:27:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:27:56,175 INFO L470 AbstractCegarLoop]: Abstraction has 7238 states and 10130 transitions. [2021-11-25 20:27:56,175 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, (38), 3 states have call predecessors, (38), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-25 20:27:56,175 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 10130 transitions. [2021-11-25 20:27:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-11-25 20:27:56,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:27:56,189 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:27:56,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:27:56,190 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:27:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:27:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1690665079, now seen corresponding path program 1 times [2021-11-25 20:27:56,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:27:56,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635810804] [2021-11-25 20:27:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:27:56,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:27:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:27:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2021-11-25 20:27:57,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:27:57,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635810804] [2021-11-25 20:27:57,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635810804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:27:57,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:27:57,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:27:57,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582057303] [2021-11-25 20:27:57,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:27:57,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:27:57,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:27:57,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:27:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:27:57,621 INFO L87 Difference]: Start difference. First operand 7238 states and 10130 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 20:27:59,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:01,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:05,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:06,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:28:06,268 INFO L93 Difference]: Finished difference Result 19237 states and 26904 transitions. [2021-11-25 20:28:06,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:28:06,268 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 339 [2021-11-25 20:28:06,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:28:06,312 INFO L225 Difference]: With dead ends: 19237 [2021-11-25 20:28:06,312 INFO L226 Difference]: Without dead ends: 12048 [2021-11-25 20:28:06,336 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 [2021-11-25 20:28:06,337 INFO L933 BasicCegarLoop]: 1817 mSDtfsCounter, 1149 mSDsluCounter, 1500 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 53 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:28:06,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1149 Valid, 3116 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 531 Invalid, 3 Unknown, 0 Unchecked, 8.2s Time] [2021-11-25 20:28:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12048 states. [2021-11-25 20:28:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12048 to 12033. [2021-11-25 20:28:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12033 states, 7992 states have (on average 1.3543543543543544) internal successors, (10824), 8061 states have internal predecessors, (10824), 2885 states have call successors, (2885), 1154 states have call predecessors, (2885), 1155 states have return successors, (2896), 2856 states have call predecessors, (2896), 2884 states have call successors, (2896) [2021-11-25 20:28:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12033 states to 12033 states and 16605 transitions. [2021-11-25 20:28:06,808 INFO L78 Accepts]: Start accepts. Automaton has 12033 states and 16605 transitions. Word has length 339 [2021-11-25 20:28:06,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:28:06,809 INFO L470 AbstractCegarLoop]: Abstraction has 12033 states and 16605 transitions. [2021-11-25 20:28:06,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2021-11-25 20:28:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 12033 states and 16605 transitions. [2021-11-25 20:28:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-11-25 20:28:06,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:28:06,824 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:28:06,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:28:06,825 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:28:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:28:06,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1097413322, now seen corresponding path program 1 times [2021-11-25 20:28:06,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:28:06,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468779729] [2021-11-25 20:28:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:28:06,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:28:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:28:08,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1567 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1564 trivial. 0 not checked. [2021-11-25 20:28:08,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:28:08,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468779729] [2021-11-25 20:28:08,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468779729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:28:08,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:28:08,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:28:08,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838718231] [2021-11-25 20:28:08,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:28:08,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:28:08,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:28:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:28:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:28:08,339 INFO L87 Difference]: Start difference. First operand 12033 states and 16605 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 20:28:10,550 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:12,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:16,055 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:28:16,952 INFO L93 Difference]: Finished difference Result 27707 states and 38246 transitions. [2021-11-25 20:28:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:28:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 356 [2021-11-25 20:28:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:28:17,028 INFO L225 Difference]: With dead ends: 27707 [2021-11-25 20:28:17,028 INFO L226 Difference]: Without dead ends: 15723 [2021-11-25 20:28:17,064 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 [2021-11-25 20:28:17,064 INFO L933 BasicCegarLoop]: 2176 mSDtfsCounter, 1081 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 3415 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:28:17,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 3415 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 505 Invalid, 3 Unknown, 0 Unchecked, 8.1s Time] [2021-11-25 20:28:17,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15723 states. [2021-11-25 20:28:17,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15723 to 15716. [2021-11-25 20:28:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15716 states, 10507 states have (on average 1.3555724754925287) internal successors, (14243), 10597 states have internal predecessors, (14243), 3696 states have call successors, (3696), 1511 states have call predecessors, (3696), 1512 states have return successors, (3711), 3655 states have call predecessors, (3711), 3695 states have call successors, (3711) [2021-11-25 20:28:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15716 states to 15716 states and 21650 transitions. [2021-11-25 20:28:17,856 INFO L78 Accepts]: Start accepts. Automaton has 15716 states and 21650 transitions. Word has length 356 [2021-11-25 20:28:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:28:17,857 INFO L470 AbstractCegarLoop]: Abstraction has 15716 states and 21650 transitions. [2021-11-25 20:28:17,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2021-11-25 20:28:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 15716 states and 21650 transitions. [2021-11-25 20:28:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-25 20:28:17,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:28:17,972 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:28:17,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:28:17,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:28:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:28:17,973 INFO L85 PathProgramCache]: Analyzing trace with hash -446321812, now seen corresponding path program 1 times [2021-11-25 20:28:17,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:28:17,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495424221] [2021-11-25 20:28:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:28:17,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:28:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:28:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1405 trivial. 0 not checked. [2021-11-25 20:28:21,548 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:28:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495424221] [2021-11-25 20:28:21,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495424221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:28:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38310019] [2021-11-25 20:28:21,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:28:21,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:28:21,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:28:21,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:28:21,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:28:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:28:26,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 14448 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:28:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:28:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 294 proven. 0 refuted. 0 times theorem prover too weak. 1123 trivial. 0 not checked. [2021-11-25 20:28:26,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:28:26,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38310019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:28:26,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:28:26,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-25 20:28:26,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059882655] [2021-11-25 20:28:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:28:26,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:28:26,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:28:26,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:28:26,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:28:26,852 INFO L87 Difference]: Start difference. First operand 15716 states and 21650 transitions. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:28:28,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:31,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:34,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:37,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:28:38,999 INFO L93 Difference]: Finished difference Result 29285 states and 40361 transitions. [2021-11-25 20:28:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:28:39,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 357 [2021-11-25 20:28:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:28:39,046 INFO L225 Difference]: With dead ends: 29285 [2021-11-25 20:28:39,047 INFO L226 Difference]: Without dead ends: 13604 [2021-11-25 20:28:39,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:28:39,079 INFO L933 BasicCegarLoop]: 1411 mSDtfsCounter, 5 mSDsluCounter, 4835 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5633 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:28:39,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 5633 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 833 Invalid, 4 Unknown, 0 Unchecked, 11.6s Time] [2021-11-25 20:28:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13604 states. [2021-11-25 20:28:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13604 to 13601. [2021-11-25 20:28:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13601 states, 9086 states have (on average 1.3558221439577371) internal successors, (12319), 9163 states have internal predecessors, (12319), 3216 states have call successors, (3216), 1299 states have call predecessors, (3216), 1298 states have return successors, (3227), 3180 states have call predecessors, (3227), 3215 states have call successors, (3227) [2021-11-25 20:28:39,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13601 states to 13601 states and 18762 transitions. [2021-11-25 20:28:39,686 INFO L78 Accepts]: Start accepts. Automaton has 13601 states and 18762 transitions. Word has length 357 [2021-11-25 20:28:39,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:28:39,687 INFO L470 AbstractCegarLoop]: Abstraction has 13601 states and 18762 transitions. [2021-11-25 20:28:39,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 3 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:28:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13601 states and 18762 transitions. [2021-11-25 20:28:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-25 20:28:39,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:28:39,701 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:28:39,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:28:39,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:28:39,917 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:28:39,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:28:39,917 INFO L85 PathProgramCache]: Analyzing trace with hash -108945322, now seen corresponding path program 1 times [2021-11-25 20:28:39,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:28:39,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898687268] [2021-11-25 20:28:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:28:39,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:28:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:28:42,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2021-11-25 20:28:42,005 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:28:42,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898687268] [2021-11-25 20:28:42,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898687268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:28:42,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:28:42,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:28:42,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920186618] [2021-11-25 20:28:42,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:28:42,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:28:42,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:28:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:28:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:28:42,009 INFO L87 Difference]: Start difference. First operand 13601 states and 18762 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:28:44,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:46,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:51,571 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 20:28:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:28:52,378 INFO L93 Difference]: Finished difference Result 30789 states and 42515 transitions. [2021-11-25 20:28:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:28:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 362 [2021-11-25 20:28:52,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:28:52,440 INFO L225 Difference]: With dead ends: 30789 [2021-11-25 20:28:52,440 INFO L226 Difference]: Without dead ends: 17245 [2021-11-25 20:28:52,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:28:52,470 INFO L933 BasicCegarLoop]: 1999 mSDtfsCounter, 1472 mSDsluCounter, 2074 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 30 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1546 SdHoareTripleChecker+Valid, 3768 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:28:52,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1546 Valid, 3768 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1113 Invalid, 3 Unknown, 0 Unchecked, 9.8s Time] [2021-11-25 20:28:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17245 states. [2021-11-25 20:28:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17245 to 17209. [2021-11-25 20:28:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17209 states, 11563 states have (on average 1.3576926403182565) internal successors, (15699), 11660 states have internal predecessors, (15699), 4012 states have call successors, (4012), 1634 states have call predecessors, (4012), 1633 states have return successors, (4027), 3965 states have call predecessors, (4027), 4011 states have call successors, (4027) [2021-11-25 20:28:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17209 states to 17209 states and 23738 transitions. [2021-11-25 20:28:53,158 INFO L78 Accepts]: Start accepts. Automaton has 17209 states and 23738 transitions. Word has length 362 [2021-11-25 20:28:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:28:53,159 INFO L470 AbstractCegarLoop]: Abstraction has 17209 states and 23738 transitions. [2021-11-25 20:28:53,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2021-11-25 20:28:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 17209 states and 23738 transitions. [2021-11-25 20:28:53,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2021-11-25 20:28:53,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:28:53,176 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:28:53,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:28:53,177 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:28:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:28:53,177 INFO L85 PathProgramCache]: Analyzing trace with hash -863296086, now seen corresponding path program 1 times [2021-11-25 20:28:53,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:28:53,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182605504] [2021-11-25 20:28:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:28:53,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:28:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:28:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2021-11-25 20:28:56,943 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:28:56,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182605504] [2021-11-25 20:28:56,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182605504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:28:56,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317971432] [2021-11-25 20:28:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:28:56,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:28:56,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:28:56,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:28:56,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c4e71514-8a0c-410c-a437-c43616d09ffb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:30:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:30:49,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 14575 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-25 20:30:49,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:30:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 434 proven. 7 refuted. 0 times theorem prover too weak. 1136 trivial. 0 not checked. [2021-11-25 20:30:50,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:30:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 1565 trivial. 0 not checked. [2021-11-25 20:30:51,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317971432] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:30:51,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542955356] [2021-11-25 20:30:51,780 INFO L159 IcfgInterpreter]: Started Sifa with 142 locations of interest [2021-11-25 20:30:51,780 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:30:51,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:30:51,789 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:30:51,790 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:31:09,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2021-11-25 20:31:11,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2021-11-25 20:31:12,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5151 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 511 [2021-11-25 20:31:16,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:17,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:18,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:18,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:18,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:18,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:18,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:18,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:31:22,352 INFO L244 Elim1Store]: Index analysis took 6294 ms