./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/array-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/array-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4c882ea31ded5d72491d0989b7efed83bec9369 ................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:31:58,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:31:58,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:31:58,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:31:58,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:31:58,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:31:58,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:31:58,296 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:31:58,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:31:58,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:31:58,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:31:58,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:31:58,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:31:58,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:31:58,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:31:58,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:31:58,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:31:58,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:31:58,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:31:58,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:31:58,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:31:58,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:31:58,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:31:58,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:31:58,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:31:58,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:31:58,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:31:58,370 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:31:58,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:31:58,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:31:58,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:31:58,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:31:58,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:31:58,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:31:58,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:31:58,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:31:58,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:31:58,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:31:58,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:31:58,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:31:58,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:31:58,386 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:31:58,427 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:31:58,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:31:58,429 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:31:58,429 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:31:58,429 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:31:58,429 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:31:58,430 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:31:58,430 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:31:58,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:31:58,430 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:31:58,431 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:31:58,432 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:31:58,432 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:31:58,432 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:31:58,433 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:31:58,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:31:58,434 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:31:58,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:31:58,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:31:58,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:31:58,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:31:58,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:31:58,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:31:58,435 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:31:58,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:31:58,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:31:58,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:31:58,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:31:58,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:31:58,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:31:58,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:31:58,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:31:58,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:31:58,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:31:58,440 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:31:58,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:31:58,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:31:58,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:31:58,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:31:58,441 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_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4c882ea31ded5d72491d0989b7efed83bec9369 [2020-12-03 12:31:58,701 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:31:58,729 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:31:58,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:31:58,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:31:58,737 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:31:58,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/../../sv-benchmarks/c/loops/array-2.c [2020-12-03 12:31:58,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/data/f4926dab5/4cdc1c8672b24b03a64351da59a54010/FLAGc59d7a647 [2020-12-03 12:31:59,400 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:31:59,401 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/sv-benchmarks/c/loops/array-2.c [2020-12-03 12:31:59,413 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/data/f4926dab5/4cdc1c8672b24b03a64351da59a54010/FLAGc59d7a647 [2020-12-03 12:31:59,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/data/f4926dab5/4cdc1c8672b24b03a64351da59a54010 [2020-12-03 12:31:59,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:31:59,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:31:59,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:31:59,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:31:59,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:31:59,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:59" (1/1) ... [2020-12-03 12:31:59,787 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395b521 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:31:59, skipping insertion in model container [2020-12-03 12:31:59,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:31:59" (1/1) ... [2020-12-03 12:31:59,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:31:59,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:31:59,990 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/sv-benchmarks/c/loops/array-2.c[319,332] [2020-12-03 12:32:00,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:00,016 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:32:00,027 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/sv-benchmarks/c/loops/array-2.c[319,332] [2020-12-03 12:32:00,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:32:00,047 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:32:00,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00 WrapperNode [2020-12-03 12:32:00,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:32:00,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:00,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:32:00,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:32:00,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,063 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:32:00,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:32:00,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:32:00,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:32:00,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,094 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... [2020-12-03 12:32:00,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:32:00,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:32:00,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:32:00,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:32:00,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/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 [2020-12-03 12:32:00,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:32:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:32:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:32:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:32:00,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:32:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-03 12:32:00,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:32:00,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:32:00,548 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-03 12:32:00,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:00 BoogieIcfgContainer [2020-12-03 12:32:00,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:32:00,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:32:00,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:32:00,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:32:00,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:31:59" (1/3) ... [2020-12-03 12:32:00,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a1f0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:00, skipping insertion in model container [2020-12-03 12:32:00,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:32:00" (2/3) ... [2020-12-03 12:32:00,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a1f0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:32:00, skipping insertion in model container [2020-12-03 12:32:00,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:00" (3/3) ... [2020-12-03 12:32:00,572 INFO L111 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-12-03 12:32:00,603 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:32:00,606 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:32:00,618 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-03 12:32:00,643 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:32:00,643 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:32:00,643 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:32:00,643 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:32:00,644 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:32:00,644 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:32:00,644 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:32:00,644 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:32:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-03 12:32:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:32:00,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:00,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:32:00,663 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2035207, now seen corresponding path program 1 times [2020-12-03 12:32:00,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:00,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126465454] [2020-12-03 12:32:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:32:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:32:01,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126465454] [2020-12-03 12:32:01,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:32:01,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:32:01,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519170422] [2020-12-03 12:32:01,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:32:01,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:32:01,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:32:01,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:32:01,037 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-12-03 12:32:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:32:01,088 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-12-03 12:32:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:32:01,091 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-03 12:32:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:32:01,100 INFO L225 Difference]: With dead ends: 13 [2020-12-03 12:32:01,101 INFO L226 Difference]: Without dead ends: 6 [2020-12-03 12:32:01,104 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 [2020-12-03 12:32:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-03 12:32:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-03 12:32:01,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-03 12:32:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-03 12:32:01,147 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-12-03 12:32:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:32:01,148 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-03 12:32:01,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:32:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-03 12:32:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:32:01,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:32:01,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:32:01,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:32:01,149 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:32:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:32:01,154 INFO L82 PathProgramCache]: Analyzing trace with hash 63196130, now seen corresponding path program 1 times [2020-12-03 12:32:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:32:01,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851343593] [2020-12-03 12:32:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:32:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:01,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:32:01,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:32:01,347 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:32:01,348 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:32:01,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:32:01,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:32:01 BoogieIcfgContainer [2020-12-03 12:32:01,379 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:32:01,380 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:32:01,380 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:32:01,380 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:32:01,381 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:32:00" (3/4) ... [2020-12-03 12:32:01,383 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:32:01,443 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1133e087-b5ff-4c71-8034-bfb3e46e4ea4/bin/utaipan/witness.graphml [2020-12-03 12:32:01,443 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:32:01,451 INFO L168 Benchmark]: Toolchain (without parser) took 1669.41 ms. Allocated memory was 111.1 MB in the beginning and 153.1 MB in the end (delta: 41.9 MB). Free memory was 84.2 MB in the beginning and 122.5 MB in the end (delta: -38.3 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:01,452 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 111.1 MB. Free memory is still 66.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:01,453 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.46 ms. Allocated memory is still 111.1 MB. Free memory was 83.8 MB in the beginning and 88.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:01,454 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.87 ms. Allocated memory is still 111.1 MB. Free memory was 88.7 MB in the beginning and 87.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:01,454 INFO L168 Benchmark]: Boogie Preprocessor took 23.25 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 86.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:01,455 INFO L168 Benchmark]: RCFGBuilder took 443.17 ms. Allocated memory is still 111.1 MB. Free memory was 86.2 MB in the beginning and 67.1 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:01,457 INFO L168 Benchmark]: TraceAbstraction took 826.94 ms. Allocated memory was 111.1 MB in the beginning and 153.1 MB in the end (delta: 41.9 MB). Free memory was 66.8 MB in the beginning and 123.9 MB in the end (delta: -57.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:32:01,457 INFO L168 Benchmark]: Witness Printer took 64.44 ms. Allocated memory is still 153.1 MB. Free memory was 123.9 MB in the beginning and 122.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:32:01,460 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 111.1 MB. Free memory is still 66.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.46 ms. Allocated memory is still 111.1 MB. Free memory was 83.8 MB in the beginning and 88.7 MB in the end (delta: -4.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.87 ms. Allocated memory is still 111.1 MB. Free memory was 88.7 MB in the beginning and 87.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.25 ms. Allocated memory is still 111.1 MB. Free memory was 87.3 MB in the beginning and 86.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 443.17 ms. Allocated memory is still 111.1 MB. Free memory was 86.2 MB in the beginning and 67.1 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 826.94 ms. Allocated memory was 111.1 MB in the beginning and 153.1 MB in the end (delta: 41.9 MB). Free memory was 66.8 MB in the beginning and 123.9 MB in the end (delta: -57.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 64.44 ms. Allocated memory is still 153.1 MB. Free memory was 123.9 MB in the beginning and 122.5 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: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] unsigned int SIZE=1; [L16] unsigned int j,k; [L17] int array[SIZE], menor; [L19] menor = __VERIFIER_nondet_int() [L21] j=0 [L21] COND TRUE j