./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- 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-4e7fbc6 [2022-11-23 14:07:02,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:07:02,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:07:02,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:07:02,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:07:02,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:07:02,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:07:02,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:07:02,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:07:02,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:07:02,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:07:02,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:07:02,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:07:02,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:07:02,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:07:02,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:07:02,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:07:02,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:07:02,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:07:02,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:07:02,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:07:02,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:07:02,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:07:02,253 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:07:02,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:07:02,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:07:02,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:07:02,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:07:02,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:07:02,267 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:07:02,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:07:02,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:07:02,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:07:02,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:07:02,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:07:02,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:07:02,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:07:02,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:07:02,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:07:02,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:07:02,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:07:02,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:07:02,315 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:07:02,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:07:02,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:07:02,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:07:02,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:07:02,324 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:07:02,325 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:07:02,325 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:07:02,325 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:07:02,325 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:07:02,325 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:07:02,326 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:07:02,326 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:07:02,326 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:07:02,326 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:07:02,326 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:07:02,327 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:07:02,327 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:07:02,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:07:02,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:07:02,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:07:02,328 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:07:02,328 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:07:02,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:07:02,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:07:02,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:07:02,329 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:07:02,329 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:07:02,330 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:07:02,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:07:02,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:07:02,330 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:07:02,330 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:07:02,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:07:02,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:07:02,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:07:02,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:07:02,332 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:07:02,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:07:02,332 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:07:02,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:07:02,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:07:02,333 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_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2022-11-23 14:07:02,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:07:02,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:07:02,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:07:02,629 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:07:02,630 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:07:02,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2022-11-23 14:07:05,783 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:07:06,061 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:07:06,062 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2022-11-23 14:07:06,070 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/data/ed8ef5295/3246730af67740428acb1f7806a8272d/FLAG2f8d7cc3a [2022-11-23 14:07:06,088 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/data/ed8ef5295/3246730af67740428acb1f7806a8272d [2022-11-23 14:07:06,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:07:06,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:07:06,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:07:06,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:07:06,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:07:06,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4538539f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06, skipping insertion in model container [2022-11-23 14:07:06,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:07:06,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:07:06,286 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_b151e86d-87a6-428f-afa2-169ce090ece7/sv-benchmarks/c/array-examples/sanfoundry_24-2.i[808,821] [2022-11-23 14:07:06,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:07:06,324 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:07:06,336 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_b151e86d-87a6-428f-afa2-169ce090ece7/sv-benchmarks/c/array-examples/sanfoundry_24-2.i[808,821] [2022-11-23 14:07:06,343 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:07:06,358 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:07:06,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06 WrapperNode [2022-11-23 14:07:06,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:07:06,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:07:06,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:07:06,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:07:06,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,409 INFO L138 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-11-23 14:07:06,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:07:06,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:07:06,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:07:06,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:07:06,422 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,464 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:07:06,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:07:06,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:07:06,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:07:06,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (1/1) ... [2022-11-23 14:07:06,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:07:06,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:06,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:07:06,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:07:06,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:07:06,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:07:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:07:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:07:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:07:06,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:07:06,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:07:06,561 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:07:06,561 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:07:06,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:07:06,639 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:07:06,642 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:07:06,922 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:07:07,011 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:07:07,012 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 14:07:07,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:07 BoogieIcfgContainer [2022-11-23 14:07:07,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:07:07,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:07:07,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:07:07,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:07:07,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:06" (1/3) ... [2022-11-23 14:07:07,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d473172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:07, skipping insertion in model container [2022-11-23 14:07:07,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:06" (2/3) ... [2022-11-23 14:07:07,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d473172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:07, skipping insertion in model container [2022-11-23 14:07:07,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:07" (3/3) ... [2022-11-23 14:07:07,024 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2022-11-23 14:07:07,045 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:07:07,045 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-23 14:07:07,113 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:07:07,119 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@21ff0b99, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:07:07,120 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-23 14:07:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.9) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:07:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:07:07,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:07,130 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:07:07,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:07,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:07,136 INFO L85 PathProgramCache]: Analyzing trace with hash 127174, now seen corresponding path program 1 times [2022-11-23 14:07:07,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:07,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812877217] [2022-11-23 14:07:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:07,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:07,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812877217] [2022-11-23 14:07:07,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812877217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:07,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:07,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:07:07,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608560999] [2022-11-23 14:07:07,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:07,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:07,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:07,415 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.9) internal successors, (38), 32 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-23 14:07:07,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:07,514 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-11-23 14:07:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:07,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-23 14:07:07,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:07,526 INFO L225 Difference]: With dead ends: 31 [2022-11-23 14:07:07,526 INFO L226 Difference]: Without dead ends: 30 [2022-11-23 14:07:07,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:07,540 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:07,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:07,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-23 14:07:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-23 14:07:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:07:07,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-23 14:07:07,598 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 3 [2022-11-23 14:07:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:07,599 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-23 14:07:07,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-23 14:07:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-23 14:07:07,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:07:07,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:07,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:07:07,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:07:07,601 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:07,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:07,602 INFO L85 PathProgramCache]: Analyzing trace with hash 127175, now seen corresponding path program 1 times [2022-11-23 14:07:07,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:07,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784237266] [2022-11-23 14:07:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:07,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:07,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784237266] [2022-11-23 14:07:07,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784237266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:07,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:07,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:07:07,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898391690] [2022-11-23 14:07:07,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:07,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:07:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:07:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:07,866 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-23 14:07:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:07,946 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-23 14:07:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:07:07,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-23 14:07:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:07,949 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:07:07,949 INFO L226 Difference]: Without dead ends: 46 [2022-11-23 14:07:07,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:07:07,951 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:07,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-23 14:07:07,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-23 14:07:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 36 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:07:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2022-11-23 14:07:07,962 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 3 [2022-11-23 14:07:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:07,963 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2022-11-23 14:07:07,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-23 14:07:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2022-11-23 14:07:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:07:07,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:07,964 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-11-23 14:07:07,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:07:07,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:07,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash 122301027, now seen corresponding path program 1 times [2022-11-23 14:07:07,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790936598] [2022-11-23 14:07:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:07,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:08,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790936598] [2022-11-23 14:07:08,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790936598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396670117] [2022-11-23 14:07:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:08,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:08,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:08,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:08,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:07:08,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:07:08,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:08,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:07:08,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:08,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:08,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396670117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:08,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972259435] [2022-11-23 14:07:08,464 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:07:08,464 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:08,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:08,475 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:08,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:08,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:07:08,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:08,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:07:08,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:08,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:07:08,798 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:07:08,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 209 [2022-11-23 14:07:09,077 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 16 treesize of output 12 [2022-11-23 14:07:09,115 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 16 treesize of output 12 [2022-11-23 14:07:09,145 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:07:09,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '224#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= 0 |ULTIMATE.start_main_~num~0#1|) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:07:09,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:07:09,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:09,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-23 14:07:09,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609785628] [2022-11-23 14:07:09,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:09,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:07:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:07:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:07:09,521 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-11-23 14:07:09,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:09,788 INFO L93 Difference]: Finished difference Result 90 states and 123 transitions. [2022-11-23 14:07:09,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:07:09,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 5 [2022-11-23 14:07:09,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:09,791 INFO L225 Difference]: With dead ends: 90 [2022-11-23 14:07:09,791 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 14:07:09,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:07:09,793 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 72 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:09,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 77 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:07:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 14:07:09,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-11-23 14:07:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 72 states have internal predecessors, (95), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:07:09,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 111 transitions. [2022-11-23 14:07:09,805 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 111 transitions. Word has length 5 [2022-11-23 14:07:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:09,805 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 111 transitions. [2022-11-23 14:07:09,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-11-23 14:07:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 111 transitions. [2022-11-23 14:07:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:07:09,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:09,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:07:09,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:10,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:10,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 125258153, now seen corresponding path program 1 times [2022-11-23 14:07:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276664029] [2022-11-23 14:07:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:10,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:10,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276664029] [2022-11-23 14:07:10,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276664029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:10,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:10,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:07:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414342902] [2022-11-23 14:07:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:10,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:07:10,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:07:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:07:10,148 INFO L87 Difference]: Start difference. First operand 82 states and 111 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-23 14:07:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:10,201 INFO L93 Difference]: Finished difference Result 81 states and 110 transitions. [2022-11-23 14:07:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:07:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-23 14:07:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:10,205 INFO L225 Difference]: With dead ends: 81 [2022-11-23 14:07:10,206 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 14:07:10,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:07:10,210 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:10,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 41 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:07:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 14:07:10,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-23 14:07:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.328358208955224) internal successors, (89), 70 states have internal predecessors, (89), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:07:10,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2022-11-23 14:07:10,230 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 5 [2022-11-23 14:07:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:10,232 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2022-11-23 14:07:10,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-23 14:07:10,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2022-11-23 14:07:10,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:07:10,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:10,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2022-11-23 14:07:10,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:07:10,238 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:10,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1340385396, now seen corresponding path program 1 times [2022-11-23 14:07:10,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:10,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524654843] [2022-11-23 14:07:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:10,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:10,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:10,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524654843] [2022-11-23 14:07:10,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524654843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:10,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201572236] [2022-11-23 14:07:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:10,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:10,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:10,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:07:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:10,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:07:10,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:10,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:10,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-11-23 14:07:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201572236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [34712336] [2022-11-23 14:07:10,639 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-23 14:07:10,639 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:10,640 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:10,640 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:10,640 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:10,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:10,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:10,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:07:10,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:10,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:07:10,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:10,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:10,852 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:07:10,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 217 treesize of output 205 [2022-11-23 14:07:10,936 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 16 treesize of output 12 [2022-11-23 14:07:10,966 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 16 treesize of output 12 [2022-11-23 14:07:11,129 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:07:11,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [34712336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:11,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:11,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4, 4] total 14 [2022-11-23 14:07:11,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695780410] [2022-11-23 14:07:11,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:11,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:07:11,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:11,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:07:11,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:07:11,807 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-23 14:07:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:12,544 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2022-11-23 14:07:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:07:12,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 8 [2022-11-23 14:07:12,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:12,545 INFO L225 Difference]: With dead ends: 101 [2022-11-23 14:07:12,545 INFO L226 Difference]: Without dead ends: 101 [2022-11-23 14:07:12,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:07:12,547 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:12,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 71 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:07:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-23 14:07:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2022-11-23 14:07:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.338235294117647) internal successors, (91), 71 states have internal predecessors, (91), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:07:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2022-11-23 14:07:12,555 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 8 [2022-11-23 14:07:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:12,556 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2022-11-23 14:07:12,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2022-11-23 14:07:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2022-11-23 14:07:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:07:12,557 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:12,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:12,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:12,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:12,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:12,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:12,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1318508829, now seen corresponding path program 1 times [2022-11-23 14:07:12,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:12,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683896560] [2022-11-23 14:07:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:12,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:12,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683896560] [2022-11-23 14:07:12,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683896560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:12,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:12,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:07:12,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805314046] [2022-11-23 14:07:12,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:12,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:07:12,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:12,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:07:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:07:12,832 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:12,890 INFO L93 Difference]: Finished difference Result 98 states and 126 transitions. [2022-11-23 14:07:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:07:12,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:07:12,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:12,893 INFO L225 Difference]: With dead ends: 98 [2022-11-23 14:07:12,894 INFO L226 Difference]: Without dead ends: 95 [2022-11-23 14:07:12,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:07:12,895 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:12,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 51 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-23 14:07:12,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2022-11-23 14:07:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 71 states have internal predecessors, (88), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:07:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2022-11-23 14:07:12,902 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 10 [2022-11-23 14:07:12,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:12,902 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2022-11-23 14:07:12,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2022-11-23 14:07:12,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:07:12,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:12,904 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2022-11-23 14:07:12,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:07:12,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1656091337, now seen corresponding path program 2 times [2022-11-23 14:07:12,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:12,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608295747] [2022-11-23 14:07:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:12,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:13,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:13,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608295747] [2022-11-23 14:07:13,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608295747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:13,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749256013] [2022-11-23 14:07:13,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:07:13,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:13,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:13,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:13,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:07:13,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 14:07:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:07:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:13,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:07:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:13,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:13,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749256013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:13,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1637269450] [2022-11-23 14:07:13,579 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:07:13,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:13,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:13,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:13,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:13,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:13,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:13,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:07:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:13,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:07:13,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:13,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:07:13,743 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:07:13,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 200 treesize of output 199 [2022-11-23 14:07:13,826 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 16 treesize of output 12 [2022-11-23 14:07:13,836 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:07:14,013 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1068#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~num~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:07:14,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:07:14,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:14,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-23 14:07:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974167172] [2022-11-23 14:07:14,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:07:14,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:07:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:07:14,016 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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) [2022-11-23 14:07:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:15,010 INFO L93 Difference]: Finished difference Result 224 states and 298 transitions. [2022-11-23 14:07:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:07:15,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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) Word has length 11 [2022-11-23 14:07:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:15,013 INFO L225 Difference]: With dead ends: 224 [2022-11-23 14:07:15,014 INFO L226 Difference]: Without dead ends: 224 [2022-11-23 14:07:15,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2022-11-23 14:07:15,015 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 247 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:15,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 298 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:07:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-11-23 14:07:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 177. [2022-11-23 14:07:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 152 states have (on average 1.2894736842105263) internal successors, (196), 155 states have internal predecessors, (196), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 14:07:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 236 transitions. [2022-11-23 14:07:15,045 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 236 transitions. Word has length 11 [2022-11-23 14:07:15,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:15,049 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 236 transitions. [2022-11-23 14:07:15,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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) [2022-11-23 14:07:15,049 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 236 transitions. [2022-11-23 14:07:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:07:15,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:15,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:15,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:15,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:15,251 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash -648665657, now seen corresponding path program 1 times [2022-11-23 14:07:15,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:15,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996996170] [2022-11-23 14:07:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:15,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:07:15,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996996170] [2022-11-23 14:07:15,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996996170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:15,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:15,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:07:15,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244846247] [2022-11-23 14:07:15,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:15,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:07:15,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:07:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:15,521 INFO L87 Difference]: Start difference. First operand 177 states and 236 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:15,673 INFO L93 Difference]: Finished difference Result 312 states and 409 transitions. [2022-11-23 14:07:15,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:07:15,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:07:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:15,676 INFO L225 Difference]: With dead ends: 312 [2022-11-23 14:07:15,676 INFO L226 Difference]: Without dead ends: 312 [2022-11-23 14:07:15,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:07:15,677 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:15,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 137 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:15,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-23 14:07:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 181. [2022-11-23 14:07:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 155 states have (on average 1.2838709677419355) internal successors, (199), 158 states have internal predecessors, (199), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 14:07:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 239 transitions. [2022-11-23 14:07:15,696 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 239 transitions. Word has length 12 [2022-11-23 14:07:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:15,696 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 239 transitions. [2022-11-23 14:07:15,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 239 transitions. [2022-11-23 14:07:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:07:15,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:15,697 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:15,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:07:15,698 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash -807030572, now seen corresponding path program 1 times [2022-11-23 14:07:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:15,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332525500] [2022-11-23 14:07:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:15,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:07:15,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:15,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332525500] [2022-11-23 14:07:15,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332525500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:07:15,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:07:15,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:07:15,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720545331] [2022-11-23 14:07:15,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:07:15,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:07:15,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:15,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:07:15,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:07:15,944 INFO L87 Difference]: Start difference. First operand 181 states and 239 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:16,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:16,085 INFO L93 Difference]: Finished difference Result 237 states and 304 transitions. [2022-11-23 14:07:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:07:16,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 14:07:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:16,087 INFO L225 Difference]: With dead ends: 237 [2022-11-23 14:07:16,087 INFO L226 Difference]: Without dead ends: 237 [2022-11-23 14:07:16,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:07:16,088 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:16,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 101 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:07:16,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-23 14:07:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 179. [2022-11-23 14:07:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 154 states have (on average 1.2792207792207793) internal successors, (197), 156 states have internal predecessors, (197), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 14:07:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 237 transitions. [2022-11-23 14:07:16,096 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 237 transitions. Word has length 17 [2022-11-23 14:07:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:16,097 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 237 transitions. [2022-11-23 14:07:16,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:07:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 237 transitions. [2022-11-23 14:07:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:07:16,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:16,098 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:07:16,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:07:16,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:16,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:16,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1357012611, now seen corresponding path program 1 times [2022-11-23 14:07:16,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:16,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978413144] [2022-11-23 14:07:16,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:16,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-23 14:07:16,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978413144] [2022-11-23 14:07:16,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978413144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307954767] [2022-11-23 14:07:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:16,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:16,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:16,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:16,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:07:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:16,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:07:16,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:16,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:16,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 25 treesize of output 21 [2022-11-23 14:07:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:16,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307954767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:16,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931930948] [2022-11-23 14:07:16,688 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:07:16,688 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:16,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:16,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:16,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:16,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:16,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:07:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:16,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:07:16,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:16,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:16,825 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:07:16,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 195 [2022-11-23 14:07:16,880 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 16 treesize of output 12 [2022-11-23 14:07:17,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:07:17,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2546#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~num~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:07:17,373 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:07:17,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:17,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 8, 8] total 19 [2022-11-23 14:07:17,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237730235] [2022-11-23 14:07:17,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:17,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:07:17,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:07:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:07:17,375 INFO L87 Difference]: Start difference. First operand 179 states and 237 transitions. Second operand has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2022-11-23 14:07:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:17,884 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-11-23 14:07:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:07:17,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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 18 [2022-11-23 14:07:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:17,886 INFO L225 Difference]: With dead ends: 234 [2022-11-23 14:07:17,887 INFO L226 Difference]: Without dead ends: 234 [2022-11-23 14:07:17,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:07:17,888 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 327 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:17,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 208 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:07:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-23 14:07:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 179. [2022-11-23 14:07:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 154 states have (on average 1.2792207792207793) internal successors, (197), 156 states have internal predecessors, (197), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-23 14:07:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 237 transitions. [2022-11-23 14:07:17,896 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 237 transitions. Word has length 18 [2022-11-23 14:07:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:17,896 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 237 transitions. [2022-11-23 14:07:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2022-11-23 14:07:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 237 transitions. [2022-11-23 14:07:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:07:17,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:17,898 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1] [2022-11-23 14:07:17,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:07:18,104 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1186973151, now seen corresponding path program 3 times [2022-11-23 14:07:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:18,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745180009] [2022-11-23 14:07:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:18,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745180009] [2022-11-23 14:07:18,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745180009] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:18,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705146780] [2022-11-23 14:07:18,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:07:18,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:18,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:18,547 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:18,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:07:18,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:07:18,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:18,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:07:18,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:18,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:07:19,267 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:19,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:19,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705146780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:19,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814171627] [2022-11-23 14:07:19,791 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:07:19,791 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:19,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:19,791 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:19,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:19,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:19,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:07:19,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:19,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:07:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:19,914 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:07:19,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 195 [2022-11-23 14:07:19,979 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 16 treesize of output 12 [2022-11-23 14:07:19,987 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:07:20,201 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3139#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~num~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:07:20,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:07:20,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:20,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-11-23 14:07:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881659477] [2022-11-23 14:07:20,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:20,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:07:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:20,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:07:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:07:20,204 INFO L87 Difference]: Start difference. First operand 179 states and 237 transitions. Second operand has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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) [2022-11-23 14:07:24,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:24,147 INFO L93 Difference]: Finished difference Result 546 states and 736 transitions. [2022-11-23 14:07:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:07:24,148 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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 [2022-11-23 14:07:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:24,150 INFO L225 Difference]: With dead ends: 546 [2022-11-23 14:07:24,151 INFO L226 Difference]: Without dead ends: 546 [2022-11-23 14:07:24,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=659, Invalid=1597, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:07:24,152 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1055 mSDsluCounter, 1261 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1079 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 4289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:24,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1079 Valid, 1399 Invalid, 4289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 3680 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 14:07:24,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2022-11-23 14:07:24,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 371. [2022-11-23 14:07:24,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 322 states have (on average 1.2826086956521738) internal successors, (413), 324 states have internal predecessors, (413), 44 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 14:07:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 501 transitions. [2022-11-23 14:07:24,167 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 501 transitions. Word has length 23 [2022-11-23 14:07:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:24,167 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 501 transitions. [2022-11-23 14:07:24,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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) [2022-11-23 14:07:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 501 transitions. [2022-11-23 14:07:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:07:24,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:24,170 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 5, 4, 4, 4, 1, 1, 1] [2022-11-23 14:07:24,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:07:24,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:24,379 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:24,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1251100676, now seen corresponding path program 2 times [2022-11-23 14:07:24,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:24,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936622758] [2022-11-23 14:07:24,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:24,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-23 14:07:24,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:24,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936622758] [2022-11-23 14:07:24,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936622758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:24,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971219239] [2022-11-23 14:07:24,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:07:24,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:24,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:24,676 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:24,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:07:24,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:07:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:07:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:07:24,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-23 14:07:24,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2022-11-23 14:07:25,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971219239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:25,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834028506] [2022-11-23 14:07:25,148 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:07:25,148 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:25,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:25,149 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:25,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:25,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:25,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:25,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:07:25,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:25,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:07:25,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:25,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:07:25,327 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:07:25,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 200 treesize of output 199 [2022-11-23 14:07:25,433 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 16 treesize of output 12 [2022-11-23 14:07:25,516 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:07:26,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4343#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~num~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:07:26,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:07:26,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:26,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-11-23 14:07:26,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961687501] [2022-11-23 14:07:26,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:26,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:07:26,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:07:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:07:26,126 INFO L87 Difference]: Start difference. First operand 371 states and 501 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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) [2022-11-23 14:07:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:26,872 INFO L93 Difference]: Finished difference Result 440 states and 595 transitions. [2022-11-23 14:07:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:07:26,873 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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 42 [2022-11-23 14:07:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:26,874 INFO L225 Difference]: With dead ends: 440 [2022-11-23 14:07:26,874 INFO L226 Difference]: Without dead ends: 48 [2022-11-23 14:07:26,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 14:07:26,875 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 456 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:26,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 205 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:07:26,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-23 14:07:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-23 14:07:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 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) [2022-11-23 14:07:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-11-23 14:07:26,878 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2022-11-23 14:07:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:26,878 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-11-23 14:07:26,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 18 states have internal predecessors, (47), 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) [2022-11-23 14:07:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-11-23 14:07:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:07:26,879 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:26,880 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 1, 1] [2022-11-23 14:07:26,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:07:27,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:07:27,081 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:27,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:27,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1826489135, now seen corresponding path program 4 times [2022-11-23 14:07:27,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:27,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133165701] [2022-11-23 14:07:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:27,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:28,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:28,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133165701] [2022-11-23 14:07:28,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133165701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:28,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870701502] [2022-11-23 14:07:28,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:07:28,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:28,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:28,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:28,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:07:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:28,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 14:07:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:07:28,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:07:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:29,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:07:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:31,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870701502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:07:31,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [980672513] [2022-11-23 14:07:31,276 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:07:31,276 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:07:31,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:07:31,277 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:07:31,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:07:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:31,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:31,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:07:31,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:31,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:07:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:07:31,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:07:31,414 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:07:31,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 200 treesize of output 199 [2022-11-23 14:07:31,489 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 16 treesize of output 12 [2022-11-23 14:07:31,498 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:07:31,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5202#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~num~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:07:31,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:07:31,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:07:31,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 68 [2022-11-23 14:07:31,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933402854] [2022-11-23 14:07:31,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:07:31,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-23 14:07:31,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:07:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-23 14:07:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=4053, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 14:07:31,919 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 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) [2022-11-23 14:07:36,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:07:36,533 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-11-23 14:07:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 14:07:36,534 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 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 47 [2022-11-23 14:07:36,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:07:36,535 INFO L225 Difference]: With dead ends: 96 [2022-11-23 14:07:36,535 INFO L226 Difference]: Without dead ends: 96 [2022-11-23 14:07:36,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=2743, Invalid=6187, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 14:07:36,538 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:07:36,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:07:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-23 14:07:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-23 14:07:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 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) [2022-11-23 14:07:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2022-11-23 14:07:36,542 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 47 [2022-11-23 14:07:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:07:36,542 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2022-11-23 14:07:36,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 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) [2022-11-23 14:07:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2022-11-23 14:07:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-23 14:07:36,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:07:36,544 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 1, 1] [2022-11-23 14:07:36,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-23 14:07:36,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:07:36,751 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:07:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:07:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1094561231, now seen corresponding path program 5 times [2022-11-23 14:07:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:07:36,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63713818] [2022-11-23 14:07:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:07:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:07:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:07:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:07:40,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:07:40,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63713818] [2022-11-23 14:07:40,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63713818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:07:40,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471663502] [2022-11-23 14:07:40,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:07:40,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:07:40,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:07:40,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:07:40,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:08:17,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-23 14:08:17,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:08:17,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 14:08:17,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:17,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:08:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:22,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:29,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471663502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:29,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713424755] [2022-11-23 14:08:29,905 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:08:29,906 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:08:29,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:08:29,906 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:08:29,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:08:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:29,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:08:29,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:29,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:08:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:29,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:08:30,028 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:08:30,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 200 treesize of output 199 [2022-11-23 14:08:30,126 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 16 treesize of output 12 [2022-11-23 14:08:30,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:08:30,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6148#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~num~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:08:30,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:08:30,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:08:30,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 141 [2022-11-23 14:08:30,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695302622] [2022-11-23 14:08:30,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:08:30,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-11-23 14:08:30,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-11-23 14:08:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7861, Invalid=13309, Unknown=0, NotChecked=0, Total=21170 [2022-11-23 14:08:30,609 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 143 states, 142 states have (on average 2.007042253521127) internal successors, (285), 142 states have internal predecessors, (285), 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) [2022-11-23 14:08:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:38,740 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2022-11-23 14:08:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-23 14:08:38,741 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 142 states have (on average 2.007042253521127) internal successors, (285), 142 states have internal predecessors, (285), 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 95 [2022-11-23 14:08:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:38,742 INFO L225 Difference]: With dead ends: 192 [2022-11-23 14:08:38,742 INFO L226 Difference]: Without dead ends: 192 [2022-11-23 14:08:38,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2579 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=12323, Invalid=24349, Unknown=0, NotChecked=0, Total=36672 [2022-11-23 14:08:38,750 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2678 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:38,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2678 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 14:08:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-23 14:08:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-23 14:08:38,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 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) [2022-11-23 14:08:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2022-11-23 14:08:38,759 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 95 [2022-11-23 14:08:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:38,760 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2022-11-23 14:08:38,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 142 states have (on average 2.007042253521127) internal successors, (285), 142 states have internal predecessors, (285), 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) [2022-11-23 14:08:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2022-11-23 14:08:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-23 14:08:38,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:38,763 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 1, 1] [2022-11-23 14:08:38,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:38,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:38,971 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:08:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash -313933041, now seen corresponding path program 6 times [2022-11-23 14:08:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:38,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371487775] [2022-11-23 14:08:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:49,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:49,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:49,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371487775] [2022-11-23 14:08:49,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371487775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:08:49,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000728140] [2022-11-23 14:08:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:08:49,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:49,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:49,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:11:06,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:11:06,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:06,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1264 conjuncts, 195 conjunts are in the unsatisfiable core [2022-11-23 14:11:06,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:06,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:11:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:20,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:51,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:51,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000728140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:51,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968341968] [2022-11-23 14:11:51,086 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:11:51,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:51,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:51,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:51,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:11:51,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:11:51,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:51,220 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:11:51,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 210 treesize of output 209 [2022-11-23 14:11:51,323 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 16 treesize of output 12 [2022-11-23 14:11:51,337 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 16 treesize of output 12 [2022-11-23 14:11:51,350 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:53,079 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8054#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= 0 |ULTIMATE.start_main_~num~0#1|) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:11:53,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:53,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:11:53,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 285 [2022-11-23 14:11:53,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387391994] [2022-11-23 14:11:53,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:53,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 287 states [2022-11-23 14:11:53,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 287 interpolants. [2022-11-23 14:11:53,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18723, Invalid=65087, Unknown=0, NotChecked=0, Total=83810 [2022-11-23 14:11:53,094 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand has 287 states, 286 states have (on average 2.0034965034965033) internal successors, (573), 286 states have internal predecessors, (573), 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) [2022-11-23 14:15:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:15:19,013 INFO L93 Difference]: Finished difference Result 384 states and 384 transitions. [2022-11-23 14:15:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-23 14:15:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 287 states, 286 states have (on average 2.0034965034965033) internal successors, (573), 286 states have internal predecessors, (573), 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 191 [2022-11-23 14:15:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:15:19,016 INFO L225 Difference]: With dead ends: 384 [2022-11-23 14:15:19,016 INFO L226 Difference]: Without dead ends: 384 [2022-11-23 14:15:19,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9406 ImplicationChecksByTransitivity, 242.5s TimeCoverageRelationStatistics Valid=45701, Invalid=101371, Unknown=0, NotChecked=0, Total=147072 [2022-11-23 14:15:19,030 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27503 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 27692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 27503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:15:19,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 27692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [189 Valid, 27503 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2022-11-23 14:15:19,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-23 14:15:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-11-23 14:15:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.0026109660574412) internal successors, (384), 383 states have internal predecessors, (384), 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) [2022-11-23 14:15:19,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 384 transitions. [2022-11-23 14:15:19,038 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 384 transitions. Word has length 191 [2022-11-23 14:15:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:15:19,057 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 384 transitions. [2022-11-23 14:15:19,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 287 states, 286 states have (on average 2.0034965034965033) internal successors, (573), 286 states have internal predecessors, (573), 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) [2022-11-23 14:15:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 384 transitions. [2022-11-23 14:15:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-23 14:15:19,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:15:19,073 INFO L195 NwaCegarLoop]: trace histogram [191, 190, 1, 1] [2022-11-23 14:15:19,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 14:15:19,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:15:19,287 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-23 14:15:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:15:19,289 INFO L85 PathProgramCache]: Analyzing trace with hash -392893041, now seen corresponding path program 7 times [2022-11-23 14:15:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:15:19,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442137236] [2022-11-23 14:15:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:15:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:15:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:15:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:15:58,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:15:58,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442137236] [2022-11-23 14:15:58,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442137236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:15:58,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897376890] [2022-11-23 14:15:58,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:15:58,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:15:58,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:15:58,247 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:15:58,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b151e86d-87a6-428f-afa2-169ce090ece7/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:15:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:15:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 387 conjunts are in the unsatisfiable core [2022-11-23 14:15:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:15:58,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2022-11-23 14:16:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:16:54,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:18:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:10,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897376890] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:18:10,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216563109] [2022-11-23 14:18:10,579 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-11-23 14:18:10,580 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:18:10,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:18:10,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:18:10,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:18:10,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:10,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:10,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 14:18:10,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:10,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:18:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:10,696 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:18:10,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 217 treesize of output 205 [2022-11-23 14:18:10,752 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 16 treesize of output 12 [2022-11-23 14:18:10,766 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 16 treesize of output 12 [2022-11-23 14:18:10,774 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:18:13,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11879#(and (not (<= (+ |ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#array~0#1.base|))) (<= 0 |ULTIMATE.start_main_~num~0#1|) (<= |ULTIMATE.start_main_#t~nondet3#1| 2147483647) (<= |ULTIMATE.start_main_~num~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#array~0#1.base|) (= |ULTIMATE.start_main_~#array~0#1.offset| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:18:13,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:18:13,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:18:13,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 572 [2022-11-23 14:18:13,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476373919] [2022-11-23 14:18:13,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:18:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 574 states [2022-11-23 14:18:13,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 574 interpolants. [2022-11-23 14:18:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74113, Invalid=258239, Unknown=0, NotChecked=0, Total=332352 [2022-11-23 14:18:13,995 INFO L87 Difference]: Start difference. First operand 384 states and 384 transitions. Second operand has 574 states, 573 states have (on average 2.0017452006980805) internal successors, (1147), 573 states have internal predecessors, (1147), 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)