./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan --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 639853f2f40cff84155fe09902eff2b5a20185f5 ............................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:57:14,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:57:14,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:57:14,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:57:14,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:57:14,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:57:14,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:57:14,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:57:14,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:57:14,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:57:14,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:57:14,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:57:14,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:57:14,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:57:14,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:57:14,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:57:14,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:57:14,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:57:14,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:57:14,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:57:14,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:57:14,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:57:14,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:57:14,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:57:14,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:57:14,375 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:57:14,376 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:57:14,378 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:57:14,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:57:14,381 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:57:14,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:57:14,383 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:57:14,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:57:14,387 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:57:14,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:57:14,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:57:14,391 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:57:14,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:57:14,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:57:14,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:57:14,394 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:57:14,398 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 01:57:14,451 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:57:14,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:57:14,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:57:14,454 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:57:14,455 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:57:14,455 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:57:14,456 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:57:14,456 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:57:14,456 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:57:14,456 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:57:14,458 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:57:14,458 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:57:14,459 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:57:14,459 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:57:14,460 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:57:14,460 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:57:14,461 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:57:14,461 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:57:14,462 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:57:14,462 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:57:14,462 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:57:14,462 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:57:14,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:57:14,463 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:57:14,463 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:57:14,464 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:57:14,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:57:14,464 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:57:14,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:57:14,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:57:14,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:57:14,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:57:14,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:57:14,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:57:14,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:57:14,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:57:14,468 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:57:14,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:57:14,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:57:14,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:57:14,469 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 639853f2f40cff84155fe09902eff2b5a20185f5 [2020-11-30 01:57:14,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:57:14,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:57:14,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:57:14,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:57:14,910 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:57:14,911 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2020-11-30 01:57:15,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/data/625ecdb90/82e98dcbece14d35b2fdd742e6b475ac/FLAGff34c3927 [2020-11-30 01:57:15,561 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:57:15,562 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength2_-read.c [2020-11-30 01:57:15,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/data/625ecdb90/82e98dcbece14d35b2fdd742e6b475ac/FLAGff34c3927 [2020-11-30 01:57:15,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/data/625ecdb90/82e98dcbece14d35b2fdd742e6b475ac [2020-11-30 01:57:15,954 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:57:15,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:57:15,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:57:15,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:57:15,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:57:15,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:57:15" (1/1) ... [2020-11-30 01:57:15,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78479b85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:15, skipping insertion in model container [2020-11-30 01:57:15,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:57:15" (1/1) ... [2020-11-30 01:57:15,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:57:16,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:57:16,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:57:16,291 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:57:16,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:57:16,332 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:57:16,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16 WrapperNode [2020-11-30 01:57:16,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:57:16,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:57:16,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:57:16,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:57:16,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:57:16,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:57:16,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:57:16,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:57:16,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... [2020-11-30 01:57:16,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:57:16,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:57:16,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:57:16,414 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:57:16,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:57:16,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:57:16,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:57:16,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:57:16,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:57:16,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:57:16,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:57:17,209 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:57:17,209 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-30 01:57:17,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:57:17 BoogieIcfgContainer [2020-11-30 01:57:17,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:57:17,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:57:17,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:57:17,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:57:17,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:57:15" (1/3) ... [2020-11-30 01:57:17,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a42b041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:57:17, skipping insertion in model container [2020-11-30 01:57:17,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:57:16" (2/3) ... [2020-11-30 01:57:17,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a42b041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:57:17, skipping insertion in model container [2020-11-30 01:57:17,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:57:17" (3/3) ... [2020-11-30 01:57:17,223 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength2_-read.c [2020-11-30 01:57:17,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:57:17,238 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-30 01:57:17,250 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-30 01:57:17,272 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:57:17,273 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:57:17,273 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:57:17,273 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:57:17,273 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:57:17,273 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:57:17,273 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:57:17,274 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:57:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-30 01:57:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:57:17,301 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:17,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:57:17,302 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:57:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:17,312 INFO L82 PathProgramCache]: Analyzing trace with hash 3894484, now seen corresponding path program 1 times [2020-11-30 01:57:17,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:17,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842825372] [2020-11-30 01:57:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:17,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842825372] [2020-11-30 01:57:17,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:17,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:57:17,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540188639] [2020-11-30 01:57:17,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:57:17,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:17,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:57:17,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:17,518 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-11-30 01:57:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:17,591 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-30 01:57:17,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:57:17,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:57:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:17,603 INFO L225 Difference]: With dead ends: 39 [2020-11-30 01:57:17,604 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 01:57:17,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:57:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 01:57:17,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-11-30 01:57:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:57:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-30 01:57:17,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2020-11-30 01:57:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:17,658 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-30 01:57:17,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:57:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-30 01:57:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:57:17,659 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:17,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:57:17,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:57:17,660 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:57:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash 3793645, now seen corresponding path program 1 times [2020-11-30 01:57:17,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:17,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803647345] [2020-11-30 01:57:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:17,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803647345] [2020-11-30 01:57:17,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:17,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:57:17,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779525980] [2020-11-30 01:57:17,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:57:17,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:17,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:57:17,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:57:17,829 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-11-30 01:57:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:17,951 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-11-30 01:57:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:57:17,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-30 01:57:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:17,953 INFO L225 Difference]: With dead ends: 40 [2020-11-30 01:57:17,953 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 01:57:17,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:57:17,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 01:57:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2020-11-30 01:57:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:57:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-30 01:57:17,960 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 4 [2020-11-30 01:57:17,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:17,960 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-30 01:57:17,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:57:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-11-30 01:57:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:57:17,961 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:17,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:57:17,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:57:17,962 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:57:17,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash 117695404, now seen corresponding path program 1 times [2020-11-30 01:57:17,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:17,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748966067] [2020-11-30 01:57:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:18,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748966067] [2020-11-30 01:57:18,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:18,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:57:18,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731072111] [2020-11-30 01:57:18,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:57:18,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:57:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:57:18,046 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-11-30 01:57:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:18,346 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-11-30 01:57:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:57:18,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-30 01:57:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:18,348 INFO L225 Difference]: With dead ends: 44 [2020-11-30 01:57:18,349 INFO L226 Difference]: Without dead ends: 44 [2020-11-30 01:57:18,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:57:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-30 01:57:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2020-11-30 01:57:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 01:57:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-30 01:57:18,355 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 5 [2020-11-30 01:57:18,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:18,355 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-30 01:57:18,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:57:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-30 01:57:18,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:57:18,356 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:18,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:57:18,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:57:18,357 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:57:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash 117692998, now seen corresponding path program 1 times [2020-11-30 01:57:18,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:18,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290996750] [2020-11-30 01:57:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:57:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:57:18,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290996750] [2020-11-30 01:57:18,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:57:18,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:57:18,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128591682] [2020-11-30 01:57:18,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:57:18,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:57:18,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:57:18,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:57:18,462 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-11-30 01:57:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:57:18,542 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-11-30 01:57:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:57:18,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 01:57:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:57:18,544 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:57:18,544 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:57:18,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:57:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:57:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 01:57:18,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:57:18,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-30 01:57:18,549 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2020-11-30 01:57:18,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:57:18,549 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-30 01:57:18,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:57:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-30 01:57:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:57:18,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:57:18,550 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:57:18,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:57:18,551 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:57:18,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:57:18,552 INFO L82 PathProgramCache]: Analyzing trace with hash 117692999, now seen corresponding path program 1 times [2020-11-30 01:57:18,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:57:18,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76553055] [2020-11-30 01:57:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:57:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:57:18,588 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:57:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:57:18,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:57:18,637 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 01:57:18,637 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:57:18,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 01:57:18,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:57:18 BoogieIcfgContainer [2020-11-30 01:57:18,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:57:18,668 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:57:18,668 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:57:18,668 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:57:18,669 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:57:17" (3/4) ... [2020-11-30 01:57:18,671 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:57:18,721 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b9fba031-5446-4124-a144-b29b75b0cb71/bin/utaipan/witness.graphml [2020-11-30 01:57:18,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:57:18,724 INFO L168 Benchmark]: Toolchain (without parser) took 2767.07 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 52.0 MB in the beginning and 68.2 MB in the end (delta: -16.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:57:18,725 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 81.8 MB. Free memory was 53.8 MB in the beginning and 53.8 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:57:18,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.72 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 51.8 MB in the beginning and 77.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:57:18,728 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.05 ms. Allocated memory is still 98.6 MB. Free memory was 77.2 MB in the beginning and 75.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:57:18,729 INFO L168 Benchmark]: Boogie Preprocessor took 32.57 ms. Allocated memory is still 98.6 MB. Free memory was 75.6 MB in the beginning and 74.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:57:18,730 INFO L168 Benchmark]: RCFGBuilder took 798.75 ms. Allocated memory is still 98.6 MB. Free memory was 74.0 MB in the beginning and 46.3 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2020-11-30 01:57:18,730 INFO L168 Benchmark]: TraceAbstraction took 1452.76 ms. Allocated memory is still 98.6 MB. Free memory was 45.7 MB in the beginning and 69.6 MB in the end (delta: -23.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:57:18,731 INFO L168 Benchmark]: Witness Printer took 54.12 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 68.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:57:18,735 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 81.8 MB. Free memory was 53.8 MB in the beginning and 53.8 MB in the end (delta: 29.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 370.72 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 51.8 MB in the beginning and 77.2 MB in the end (delta: -25.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.05 ms. Allocated memory is still 98.6 MB. Free memory was 77.2 MB in the beginning and 75.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.57 ms. Allocated memory is still 98.6 MB. Free memory was 75.6 MB in the beginning and 74.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 798.75 ms. Allocated memory is still 98.6 MB. Free memory was 74.0 MB in the beginning and 46.3 MB in the end (delta: 27.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1452.76 ms. Allocated memory is still 98.6 MB. Free memory was 45.7 MB in the beginning and 69.6 MB in the end (delta: -23.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 54.12 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 68.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L32] int i, b[100]; [L33] i = 0 [L33] COND TRUE i < 100 [L21] int a[n], i; [L22] i = 0 [L22] COND FALSE !(i < size) [L12] int res = 0, i; [L13] i = 0 [L13] COND TRUE i < size [L14] b[i] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 123 SDslu, 98 SDs, 0 SdLazy, 104 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 47 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 168 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...