./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/vogal-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/vogal-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh --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 32bit --witnessprinter.graph.data.programhash d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:35:41,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:35:41,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:35:41,230 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:35:41,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:35:41,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:35:41,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:35:41,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:35:41,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:35:41,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:35:41,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:35:41,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:35:41,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:35:41,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:35:41,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:35:41,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:35:41,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:35:41,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:35:41,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:35:41,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:35:41,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:35:41,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:35:41,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:35:41,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:35:41,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:35:41,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:35:41,256 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:35:41,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:35:41,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:35:41,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:35:41,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:35:41,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:35:41,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:35:41,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:35:41,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:35:41,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:35:41,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:35:41,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:35:41,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:35:41,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:35:41,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:35:41,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 10:35:41,279 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:35:41,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:35:41,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:35:41,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:35:41,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:35:41,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:35:41,281 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:35:41,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:35:41,281 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:35:41,281 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:35:41,281 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:35:41,281 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:35:41,281 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:35:41,282 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:35:41,282 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:35:41,282 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:35:41,282 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:35:41,282 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:35:41,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 10:35:41,283 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:35:41,284 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 10:35:41,284 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:35:41,284 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 10:35:41,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:35:41,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:35:41,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:35:41,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:35:41,284 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:35:41,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:35:41,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 10:35:41,285 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:35:41,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:35:41,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 10:35:41,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:35:41,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d71e1bf3f69689e919d6628cf273516827c854b2b9e73a5faa1a7ff2c381c776 [2022-12-14 10:35:41,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:35:41,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:35:41,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:35:41,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:35:41,469 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:35:41,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops/vogal-2.i [2022-12-14 10:35:44,044 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:35:44,178 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:35:44,179 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/sv-benchmarks/c/loops/vogal-2.i [2022-12-14 10:35:44,183 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/data/b2512ff7a/caafb75adaf44c398a6abd21f8e8ad6e/FLAG9d2611846 [2022-12-14 10:35:44,196 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/data/b2512ff7a/caafb75adaf44c398a6abd21f8e8ad6e [2022-12-14 10:35:44,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:35:44,199 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:35:44,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:35:44,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:35:44,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:35:44,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d3c7ea5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44, skipping insertion in model container [2022-12-14 10:35:44,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:35:44,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:35:44,327 WARN L237 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_73fcd325-478c-488e-8654-0ed3aed80ee6/sv-benchmarks/c/loops/vogal-2.i[808,821] [2022-12-14 10:35:44,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:35:44,350 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:35:44,359 WARN L237 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_73fcd325-478c-488e-8654-0ed3aed80ee6/sv-benchmarks/c/loops/vogal-2.i[808,821] [2022-12-14 10:35:44,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:35:44,378 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:35:44,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44 WrapperNode [2022-12-14 10:35:44,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:35:44,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:35:44,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:35:44,379 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:35:44,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,405 INFO L138 Inliner]: procedures = 16, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2022-12-14 10:35:44,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:35:44,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:35:44,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:35:44,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:35:44,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,423 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:35:44,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:35:44,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:35:44,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:35:44,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (1/1) ... [2022-12-14 10:35:44,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:35:44,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:44,451 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:35:44,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:35:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:35:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 10:35:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:35:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 10:35:44,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:35:44,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:35:44,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 10:35:44,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:35:44,554 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:35:44,556 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:35:44,718 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:35:44,785 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:35:44,785 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 10:35:44,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:35:44 BoogieIcfgContainer [2022-12-14 10:35:44,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:35:44,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:35:44,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:35:44,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:35:44,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:35:44" (1/3) ... [2022-12-14 10:35:44,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea657f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:35:44, skipping insertion in model container [2022-12-14 10:35:44,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:35:44" (2/3) ... [2022-12-14 10:35:44,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea657f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:35:44, skipping insertion in model container [2022-12-14 10:35:44,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:35:44" (3/3) ... [2022-12-14 10:35:44,798 INFO L112 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-12-14 10:35:44,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:35:44,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 10:35:44,869 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:35:44,875 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@246ef0fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:35:44,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 10:35:44,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:35:44,884 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:44,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:44,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -969448755, now seen corresponding path program 1 times [2022-12-14 10:35:44,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:44,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148179230] [2022-12-14 10:35:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:44,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:35:45,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:45,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148179230] [2022-12-14 10:35:45,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148179230] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:35:45,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:35:45,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:35:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391471160] [2022-12-14 10:35:45,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:35:45,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 10:35:45,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:45,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 10:35:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:35:45,084 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:45,117 INFO L93 Difference]: Finished difference Result 28 states and 41 transitions. [2022-12-14 10:35:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 10:35:45,119 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:35:45,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:45,125 INFO L225 Difference]: With dead ends: 28 [2022-12-14 10:35:45,125 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 10:35:45,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 10:35:45,129 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:45,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:35:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 10:35:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 10:35:45,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2022-12-14 10:35:45,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2022-12-14 10:35:45,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:45,152 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2022-12-14 10:35:45,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,153 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2022-12-14 10:35:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:35:45,153 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:45,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:45,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 10:35:45,153 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1630845269, now seen corresponding path program 1 times [2022-12-14 10:35:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:45,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298991644] [2022-12-14 10:35:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:45,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:35:45,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:45,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298991644] [2022-12-14 10:35:45,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298991644] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:35:45,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:35:45,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:35:45,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058392258] [2022-12-14 10:35:45,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:35:45,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:35:45,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:45,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:35:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:35:45,270 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:45,308 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2022-12-14 10:35:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:35:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 10:35:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:45,309 INFO L225 Difference]: With dead ends: 36 [2022-12-14 10:35:45,309 INFO L226 Difference]: Without dead ends: 24 [2022-12-14 10:35:45,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:35:45,310 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:45,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:35:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-12-14 10:35:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2022-12-14 10:35:45,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 20 transitions. [2022-12-14 10:35:45,314 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 20 transitions. Word has length 11 [2022-12-14 10:35:45,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:45,314 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 20 transitions. [2022-12-14 10:35:45,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,314 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 20 transitions. [2022-12-14 10:35:45,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:35:45,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:45,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:45,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 10:35:45,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1071345973, now seen corresponding path program 1 times [2022-12-14 10:35:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:45,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917453944] [2022-12-14 10:35:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:45,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:35:45,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917453944] [2022-12-14 10:35:45,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917453944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:45,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581189381] [2022-12-14 10:35:45,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:45,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:45,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:45,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 10:35:45,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:45,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:35:45,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:35:45,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:35:45,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581189381] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:35:45,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:35:45,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 7 [2022-12-14 10:35:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779149752] [2022-12-14 10:35:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:35:45,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:35:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:45,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:35:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:35:45,544 INFO L87 Difference]: Start difference. First operand 15 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:45,596 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2022-12-14 10:35:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:35:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 10:35:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:45,597 INFO L225 Difference]: With dead ends: 31 [2022-12-14 10:35:45,597 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 10:35:45,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:35:45,599 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:45,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 37 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:35:45,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 10:35:45,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-12-14 10:35:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2022-12-14 10:35:45,604 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 12 [2022-12-14 10:35:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:45,604 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2022-12-14 10:35:45,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2022-12-14 10:35:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:35:45,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:45,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:45,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:35:45,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:45,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:45,809 INFO L85 PathProgramCache]: Analyzing trace with hash 467291556, now seen corresponding path program 1 times [2022-12-14 10:35:45,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:45,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545721645] [2022-12-14 10:35:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:45,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:35:46,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:46,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545721645] [2022-12-14 10:35:46,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545721645] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:46,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96039002] [2022-12-14 10:35:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:46,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:46,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:46,036 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:46,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 10:35:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:46,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 10:35:46,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:35:46,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:35:46,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96039002] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:35:46,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 10:35:46,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-12-14 10:35:46,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858089425] [2022-12-14 10:35:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:35:46,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:35:46,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:35:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:35:46,114 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:46,155 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-12-14 10:35:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:35:46,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:35:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:46,157 INFO L225 Difference]: With dead ends: 52 [2022-12-14 10:35:46,157 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 10:35:46,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:35:46,158 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:46,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:35:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 10:35:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2022-12-14 10:35:46,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-12-14 10:35:46,165 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 15 [2022-12-14 10:35:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:46,165 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-12-14 10:35:46,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:46,165 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-12-14 10:35:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:35:46,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:46,166 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:46,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 10:35:46,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:46,368 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:46,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2121157047, now seen corresponding path program 1 times [2022-12-14 10:35:46,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:46,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055624610] [2022-12-14 10:35:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:46,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:35:46,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055624610] [2022-12-14 10:35:46,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055624610] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:46,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372988714] [2022-12-14 10:35:46,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:46,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:46,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:46,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:46,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 10:35:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:35:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:46,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 10:35:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:35:46,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:46,857 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 10:35:46,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 31 [2022-12-14 10:35:46,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:35:46,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372988714] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:46,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:35:46,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 8] total 15 [2022-12-14 10:35:46,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980133861] [2022-12-14 10:35:46,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:35:46,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:35:46,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:46,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:35:46,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:35:46,877 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:46,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:46,998 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-12-14 10:35:46,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:35:46,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:35:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:46,999 INFO L225 Difference]: With dead ends: 36 [2022-12-14 10:35:46,999 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 10:35:47,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:35:47,001 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:47,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 10:35:47,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 10:35:47,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 10:35:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2022-12-14 10:35:47,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2022-12-14 10:35:47,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:47,005 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2022-12-14 10:35:47,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2022-12-14 10:35:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 10:35:47,006 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:47,006 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:47,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 10:35:47,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:47,208 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1738556233, now seen corresponding path program 1 times [2022-12-14 10:35:47,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:47,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450642200] [2022-12-14 10:35:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:47,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:47,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:35:47,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450642200] [2022-12-14 10:35:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450642200] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:47,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435057072] [2022-12-14 10:35:47,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:47,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:47,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:47,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 10:35:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:35:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:47,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-14 10:35:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:35:47,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:47,619 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 10:35:47,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 32 [2022-12-14 10:35:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:35:47,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435057072] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:35:47,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [680415750] [2022-12-14 10:35:47,653 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:35:47,653 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:35:47,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:35:47,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:35:47,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:35:47,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,732 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:35:47,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-12-14 10:35:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,777 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 10:35:47,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 10:35:47,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-12-14 10:35:47,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:47,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:48,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:48,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:48,162 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-12-14 10:35:48,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-12-14 10:35:48,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 10:35:48,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:35:48,627 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:35:49,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '752#(and (= |ULTIMATE.start_main_~cont_aux~0#1| 0) (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:35:49,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:35:49,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:35:49,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 8, 7] total 15 [2022-12-14 10:35:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523515272] [2022-12-14 10:35:49,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:35:49,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:35:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:49,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:35:49,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:35:49,045 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:49,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:49,247 INFO L93 Difference]: Finished difference Result 89 states and 123 transitions. [2022-12-14 10:35:49,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 10:35:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 10:35:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:49,249 INFO L225 Difference]: With dead ends: 89 [2022-12-14 10:35:49,249 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 10:35:49,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=781, Unknown=0, NotChecked=0, Total=992 [2022-12-14 10:35:49,250 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 124 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:49,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 56 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:35:49,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 10:35:49,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 25. [2022-12-14 10:35:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.375) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2022-12-14 10:35:49,258 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 17 [2022-12-14 10:35:49,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:49,259 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2022-12-14 10:35:49,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2022-12-14 10:35:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 10:35:49,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:49,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:49,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 10:35:49,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:49,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1327780082, now seen corresponding path program 1 times [2022-12-14 10:35:49,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:49,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975530742] [2022-12-14 10:35:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:49,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:35:49,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975530742] [2022-12-14 10:35:49,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975530742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084738372] [2022-12-14 10:35:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:49,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:49,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:49,656 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:49,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:35:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:49,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:35:49,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 10:35:49,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 10:35:49,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084738372] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:35:49,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [927990259] [2022-12-14 10:35:49,760 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 10:35:49,760 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:35:49,761 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:35:49,761 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:35:49,761 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:35:49,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,802 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:35:49,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-12-14 10:35:49,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,844 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 10:35:49,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 10:35:49,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:49,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-12-14 10:35:50,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:50,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:50,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:50,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:50,225 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-12-14 10:35:50,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-12-14 10:35:50,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 10:35:50,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:35:50,644 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:35:51,355 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~cont~0#1| 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.offset|) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:35:51,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:35:51,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:35:51,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-12-14 10:35:51,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252788323] [2022-12-14 10:35:51,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:35:51,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 10:35:51,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 10:35:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-12-14 10:35:51,357 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:51,755 INFO L93 Difference]: Finished difference Result 126 states and 183 transitions. [2022-12-14 10:35:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 10:35:51,755 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 10:35:51,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:51,756 INFO L225 Difference]: With dead ends: 126 [2022-12-14 10:35:51,756 INFO L226 Difference]: Without dead ends: 105 [2022-12-14 10:35:51,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=217, Invalid=1043, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 10:35:51,757 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 116 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:51,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 61 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:35:51,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-14 10:35:51,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 29. [2022-12-14 10:35:51,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-12-14 10:35:51,763 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2022-12-14 10:35:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:51,763 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-12-14 10:35:51,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-12-14 10:35:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 10:35:51,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:51,764 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:51,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:35:51,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 10:35:51,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:51,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1570296910, now seen corresponding path program 1 times [2022-12-14 10:35:51,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:51,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733550775] [2022-12-14 10:35:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:51,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 10:35:52,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733550775] [2022-12-14 10:35:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733550775] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950332752] [2022-12-14 10:35:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:52,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:52,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:52,057 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:52,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 10:35:52,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:52,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:35:52,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:35:52,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:35:52,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950332752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:35:52,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584208501] [2022-12-14 10:35:52,174 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:35:52,175 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:35:52,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:35:52,175 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:35:52,175 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:35:52,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,221 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 10:35:52,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 10:35:52,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 10:35:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 144 treesize of output 179 [2022-12-14 10:35:52,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:52,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:52,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:52,564 INFO L321 Elim1Store]: treesize reduction 1241, result has 7.7 percent of original size [2022-12-14 10:35:52,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 61 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 501 treesize of output 442 [2022-12-14 10:35:52,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 10:35:52,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:35:52,906 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:35:53,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1510#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~cont~0#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:35:53,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:35:53,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:35:53,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 5] total 12 [2022-12-14 10:35:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642958964] [2022-12-14 10:35:53,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:35:53,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 10:35:53,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 10:35:53,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:35:53,346 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:54,005 INFO L93 Difference]: Finished difference Result 138 states and 208 transitions. [2022-12-14 10:35:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 10:35:54,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 10:35:54,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:54,006 INFO L225 Difference]: With dead ends: 138 [2022-12-14 10:35:54,006 INFO L226 Difference]: Without dead ends: 114 [2022-12-14 10:35:54,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1934, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 10:35:54,008 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:54,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 105 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:35:54,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-14 10:35:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 42. [2022-12-14 10:35:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:54,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-12-14 10:35:54,024 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 23 [2022-12-14 10:35:54,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:54,024 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-12-14 10:35:54,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-12-14 10:35:54,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 10:35:54,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:54,025 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:54,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 10:35:54,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:54,227 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1847823321, now seen corresponding path program 2 times [2022-12-14 10:35:54,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:54,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599841035] [2022-12-14 10:35:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:54,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 10:35:54,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:54,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599841035] [2022-12-14 10:35:54,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599841035] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:54,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347487111] [2022-12-14 10:35:54,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:35:54,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:54,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:54,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 10:35:54,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 10:35:54,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:35:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:35:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:54,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:54,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:35:54,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-14 10:35:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 10:35:54,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:54,761 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 10:35:54,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 1 [2022-12-14 10:35:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 10:35:54,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347487111] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:54,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:35:54,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 18 [2022-12-14 10:35:54,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246877307] [2022-12-14 10:35:54,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:35:54,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 10:35:54,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:54,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 10:35:54,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-12-14 10:35:54,764 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:54,889 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2022-12-14 10:35:54,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:35:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 10:35:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:54,890 INFO L225 Difference]: With dead ends: 65 [2022-12-14 10:35:54,890 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 10:35:54,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:35:54,891 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:54,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:35:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 10:35:54,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-12-14 10:35:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:54,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-12-14 10:35:54,904 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 28 [2022-12-14 10:35:54,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:54,905 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-12-14 10:35:54,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-12-14 10:35:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 10:35:54,905 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:54,905 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:54,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 10:35:55,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:55,107 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:55,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1103975400, now seen corresponding path program 1 times [2022-12-14 10:35:55,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:55,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796623030] [2022-12-14 10:35:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:55,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 10:35:55,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:55,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796623030] [2022-12-14 10:35:55,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796623030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:55,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121263277] [2022-12-14 10:35:55,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:55,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:55,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:55,336 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:55,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:35:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:35:55,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 10:35:55,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 10:35:55,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121263277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:35:55,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92917421] [2022-12-14 10:35:55,552 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:35:55,552 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:35:55,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:35:55,552 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:35:55,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:35:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,589 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:35:55,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-12-14 10:35:55,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,626 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 10:35:55,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 10:35:55,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-12-14 10:35:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:55,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:55,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:55,871 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-12-14 10:35:55,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-12-14 10:35:55,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 10:35:55,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:35:56,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:35:56,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2465#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:35:56,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:35:56,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:35:56,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 11] total 17 [2022-12-14 10:35:56,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715309790] [2022-12-14 10:35:56,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:35:56,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 10:35:56,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:56,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 10:35:56,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-12-14 10:35:56,782 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:57,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:57,687 INFO L93 Difference]: Finished difference Result 269 states and 317 transitions. [2022-12-14 10:35:57,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 10:35:57,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-14 10:35:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:57,689 INFO L225 Difference]: With dead ends: 269 [2022-12-14 10:35:57,689 INFO L226 Difference]: Without dead ends: 232 [2022-12-14 10:35:57,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 10:35:57,691 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:57,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 241 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:35:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-12-14 10:35:57,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 49. [2022-12-14 10:35:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-12-14 10:35:57,704 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 32 [2022-12-14 10:35:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:57,704 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-12-14 10:35:57,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-12-14 10:35:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 10:35:57,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:57,705 INFO L195 NwaCegarLoop]: trace histogram [10, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:57,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:35:57,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:57,906 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:57,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:57,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1358463064, now seen corresponding path program 2 times [2022-12-14 10:35:57,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:57,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161862400] [2022-12-14 10:35:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:57,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:35:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 10:35:58,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:35:58,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161862400] [2022-12-14 10:35:58,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161862400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:35:58,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514773247] [2022-12-14 10:35:58,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:35:58,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:35:58,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:35:58,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:35:58,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 10:35:58,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:35:58,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:35:58,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:35:58,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:35:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 10:35:58,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:35:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-12-14 10:35:58,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514773247] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:35:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [220109127] [2022-12-14 10:35:58,286 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:35:58,286 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:35:58,286 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:35:58,287 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:35:58,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:35:58,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,324 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 10:35:58,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 35 [2022-12-14 10:35:58,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,364 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 10:35:58,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 10:35:58,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-12-14 10:35:58,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:58,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:58,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:35:58,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:35:58,653 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-12-14 10:35:58,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-12-14 10:35:58,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 10:35:58,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:35:59,040 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:35:59,494 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3293#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:35:59,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:35:59,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:35:59,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 10:35:59,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925088202] [2022-12-14 10:35:59,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:35:59,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 10:35:59,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:35:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 10:35:59,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-12-14 10:35:59,496 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:59,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:35:59,622 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-12-14 10:35:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 10:35:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-14 10:35:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:35:59,622 INFO L225 Difference]: With dead ends: 81 [2022-12-14 10:35:59,622 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 10:35:59,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:35:59,623 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:35:59,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:35:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 10:35:59,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-12-14 10:35:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2022-12-14 10:35:59,641 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 38 [2022-12-14 10:35:59,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:35:59,641 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2022-12-14 10:35:59,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:35:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2022-12-14 10:35:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 10:35:59,642 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:35:59,642 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:35:59,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 10:35:59,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 10:35:59,843 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:35:59,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:35:59,843 INFO L85 PathProgramCache]: Analyzing trace with hash 280384808, now seen corresponding path program 3 times [2022-12-14 10:35:59,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:35:59,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548388261] [2022-12-14 10:35:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:35:59,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:35:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:36:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 10:36:00,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 10:36:00,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548388261] [2022-12-14 10:36:00,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548388261] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 10:36:00,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496804523] [2022-12-14 10:36:00,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:36:00,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:36:00,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:36:00,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:36:00,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 10:36:00,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:36:00,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:36:00,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 10:36:00,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:36:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 10:36:00,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:36:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-12-14 10:36:00,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496804523] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:36:00,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584688421] [2022-12-14 10:36:00,471 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 10:36:00,471 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 10:36:00,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 10:36:00,471 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 10:36:00,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 10:36:00,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,509 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 10:36:00,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 10:36:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 10:36:00,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 63 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 158 [2022-12-14 10:36:00,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:00,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:00,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:36:00,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:36:00,756 INFO L321 Elim1Store]: treesize reduction 909, result has 12.8 percent of original size [2022-12-14 10:36:00,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 59 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 48 case distinctions, treesize of input 452 treesize of output 437 [2022-12-14 10:36:00,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-12-14 10:36:00,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:36:01,218 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 10:36:02,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3846#(and (<= 0 |ULTIMATE.start_main_~#vetor_vogais~0#1.base|) (= |ULTIMATE.start_main_~#string_entrada~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~cont_aux~0#1|) (<= 0 |ULTIMATE.start_main_~cont~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#string_entrada~0#1.base|) (+ |ULTIMATE.start_main_~#string_entrada~0#1.offset| (ite (<= (mod |ULTIMATE.start_main_~i~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (+ (mod |ULTIMATE.start_main_~i~0#1| 4294967296) (- 4294967296))))) 0) (<= 0 |ULTIMATE.start_main_~#string_entrada~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~n_caracter~0#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= (mod |ULTIMATE.start_main_~cont~0#1| 4294967296) (mod |ULTIMATE.start_main_~cont_aux~0#1| 4294967296)) 1 0)) (= |ULTIMATE.start_main_~#vetor_vogais~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 10:36:02,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 10:36:02,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 10:36:02,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20, 11] total 30 [2022-12-14 10:36:02,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537283669] [2022-12-14 10:36:02,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 10:36:02,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 10:36:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 10:36:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 10:36:02,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 10:36:02,089 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:36:05,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:36:05,505 INFO L93 Difference]: Finished difference Result 326 states and 383 transitions. [2022-12-14 10:36:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-12-14 10:36:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 10:36:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:36:05,506 INFO L225 Difference]: With dead ends: 326 [2022-12-14 10:36:05,506 INFO L226 Difference]: Without dead ends: 297 [2022-12-14 10:36:05,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 180 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4954 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1173, Invalid=15597, Unknown=0, NotChecked=0, Total=16770 [2022-12-14 10:36:05,508 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 250 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 3931 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 4297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 3931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:36:05,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 868 Invalid, 4297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 3931 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 10:36:05,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-12-14 10:36:05,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 61. [2022-12-14 10:36:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:36:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-12-14 10:36:05,528 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 44 [2022-12-14 10:36:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:36:05,529 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-12-14 10:36:05,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 30 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:36:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-12-14 10:36:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 10:36:05,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:36:05,529 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:05,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 10:36:05,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 10:36:05,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 10:36:05,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:36:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1264749720, now seen corresponding path program 4 times [2022-12-14 10:36:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 10:36:05,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615331305] [2022-12-14 10:36:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:36:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 10:36:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:36:06,178 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 10:36:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 10:36:06,435 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 10:36:06,435 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 10:36:06,436 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 10:36:06,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 10:36:06,440 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:36:06,443 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 10:36:06,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 10:36:06 BoogieIcfgContainer [2022-12-14 10:36:06,475 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 10:36:06,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 10:36:06,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 10:36:06,476 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 10:36:06,476 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:35:44" (3/4) ... [2022-12-14 10:36:06,478 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 10:36:06,515 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73fcd325-478c-488e-8654-0ed3aed80ee6/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 10:36:06,515 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 10:36:06,515 INFO L158 Benchmark]: Toolchain (without parser) took 22316.38ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 93.1MB in the beginning and 106.5MB in the end (delta: -13.3MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2022-12-14 10:36:06,516 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:36:06,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.26ms. Allocated memory is still 136.3MB. Free memory was 93.0MB in the beginning and 82.0MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 10:36:06,516 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.67ms. Allocated memory is still 136.3MB. Free memory was 82.0MB in the beginning and 80.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 10:36:06,516 INFO L158 Benchmark]: Boogie Preprocessor took 19.24ms. Allocated memory is still 136.3MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:36:06,516 INFO L158 Benchmark]: RCFGBuilder took 362.46ms. Allocated memory is still 136.3MB. Free memory was 78.4MB in the beginning and 61.1MB in the end (delta: 17.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 10:36:06,517 INFO L158 Benchmark]: TraceAbstraction took 21684.57ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 60.6MB in the beginning and 110.7MB in the end (delta: -50.1MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. [2022-12-14 10:36:06,517 INFO L158 Benchmark]: Witness Printer took 39.16ms. Allocated memory is still 163.6MB. Free memory was 110.7MB in the beginning and 106.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 10:36:06,519 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 136.3MB. Free memory is still 81.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.26ms. Allocated memory is still 136.3MB. Free memory was 93.0MB in the beginning and 82.0MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.67ms. Allocated memory is still 136.3MB. Free memory was 82.0MB in the beginning and 80.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.24ms. Allocated memory is still 136.3MB. Free memory was 80.0MB in the beginning and 78.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 362.46ms. Allocated memory is still 136.3MB. Free memory was 78.4MB in the beginning and 61.1MB in the end (delta: 17.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 21684.57ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 60.6MB in the beginning and 110.7MB in the end (delta: -50.1MB). Peak memory consumption was 50.5MB. Max. memory is 16.1GB. * Witness Printer took 39.16ms. Allocated memory is still 163.6MB. Free memory was 110.7MB in the beginning and 106.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] char string_entrada[10], vetor_vogais[]={'a','A','e','E','i','I','o','O','u','U','\0'}; [L27] unsigned int i,j,cont, tam_string, n_caracter; [L29] i=0 VAL [i=0, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=1, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=2, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=3, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=4, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=5, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=6, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=7, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=8, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=9, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND TRUE i<10 [L30] string_entrada[i] = __VERIFIER_nondet_char() [L29] i++ VAL [i=10, string_entrada={12:0}, vetor_vogais={13:0}] [L29] COND FALSE !(i<10) [L32] string_entrada[10 -1]='\0' [L34] n_caracter = 0 VAL [i=10, n_caracter=0, string_entrada={12:0}, vetor_vogais={13:0}] [L35] EXPR string_entrada[n_caracter] VAL [i=10, n_caracter=0, string_entrada={12:0}, string_entrada[n_caracter]=117, vetor_vogais={13:0}] [L35] COND TRUE string_entrada[n_caracter]!='\0' [L36] n_caracter++ VAL [i=10, n_caracter=1, string_entrada={12:0}, vetor_vogais={13:0}] [L35] EXPR string_entrada[n_caracter] VAL [i=10, n_caracter=1, string_entrada={12:0}, string_entrada[n_caracter]=0, vetor_vogais={13:0}] [L35] COND FALSE !(string_entrada[n_caracter]!='\0') [L38] cont = 0 [L39] i=0 VAL [cont=0, i=0, n_caracter=1, string_entrada={12:0}, vetor_vogais={13:0}] [L39] COND TRUE i