./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark27_linear.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark27_linear.i -s /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d74be85e157db5a333b620e4febf366c094179ee ..................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:34:06,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:34:06,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:34:06,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:34:06,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:34:06,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:34:06,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:34:06,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:34:06,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:34:06,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:34:06,227 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:34:06,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:34:06,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:34:06,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:34:06,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:34:06,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:34:06,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:34:06,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:34:06,249 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:34:06,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:34:06,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:34:06,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:34:06,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:34:06,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:34:06,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:34:06,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:34:06,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:34:06,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:34:06,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:34:06,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:34:06,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:34:06,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:34:06,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:34:06,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:34:06,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:34:06,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:34:06,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:34:06,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:34:06,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:34:06,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:34:06,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:34:06,303 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-11-28 07:34:06,354 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:34:06,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:34:06,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:34:06,357 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:34:06,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:34:06,357 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:34:06,358 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:34:06,358 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:34:06,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:34:06,359 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:34:06,360 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:34:06,360 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:34:06,361 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:34:06,361 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:34:06,361 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:34:06,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:34:06,363 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:34:06,363 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:34:06,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:34:06,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:34:06,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:34:06,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:34:06,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:34:06,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:34:06,365 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 07:34:06,365 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:34:06,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:34:06,366 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:34:06,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:34:06,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:34:06,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:34:06,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:34:06,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:34:06,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:34:06,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:34:06,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:34:06,371 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:34:06,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:34:06,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:34:06,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:34:06,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:34:06,372 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_beb26311-9eba-4426-80f7-d2c6359c479c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d74be85e157db5a333b620e4febf366c094179ee [2020-11-28 07:34:06,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:34:06,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:34:06,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:34:06,788 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:34:06,789 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:34:06,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/../../sv-benchmarks/c/loop-zilu/benchmark27_linear.i [2020-11-28 07:34:06,889 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/data/0ae21d748/c91e5e224cdd4f5289a21fb739117a7f/FLAG7fc39f03e [2020-11-28 07:34:07,495 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:34:07,496 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/sv-benchmarks/c/loop-zilu/benchmark27_linear.i [2020-11-28 07:34:07,504 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/data/0ae21d748/c91e5e224cdd4f5289a21fb739117a7f/FLAG7fc39f03e [2020-11-28 07:34:07,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/data/0ae21d748/c91e5e224cdd4f5289a21fb739117a7f [2020-11-28 07:34:07,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:34:07,890 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:34:07,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:34:07,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:34:07,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:34:07,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:07" (1/1) ... [2020-11-28 07:34:07,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78af17ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:07, skipping insertion in model container [2020-11-28 07:34:07,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:34:07" (1/1) ... [2020-11-28 07:34:07,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:34:07,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:34:08,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:34:08,258 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:34:08,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:34:08,308 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:34:08,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08 WrapperNode [2020-11-28 07:34:08,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:34:08,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:34:08,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:34:08,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:34:08,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,329 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:34:08,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:34:08,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:34:08,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:34:08,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,373 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... [2020-11-28 07:34:08,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:34:08,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:34:08,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:34:08,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:34:08,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/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 [2020-11-28 07:34:08,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:34:08,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:34:08,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:34:08,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:34:09,035 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:34:09,035 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 07:34:09,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:09 BoogieIcfgContainer [2020-11-28 07:34:09,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:34:09,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:34:09,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:34:09,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:34:09,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:34:07" (1/3) ... [2020-11-28 07:34:09,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cc6737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:09, skipping insertion in model container [2020-11-28 07:34:09,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:34:08" (2/3) ... [2020-11-28 07:34:09,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52cc6737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:34:09, skipping insertion in model container [2020-11-28 07:34:09,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:09" (3/3) ... [2020-11-28 07:34:09,048 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark27_linear.i [2020-11-28 07:34:09,071 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:34:09,084 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-28 07:34:09,104 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-28 07:34:09,131 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:34:09,131 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:34:09,131 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:34:09,131 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:34:09,132 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:34:09,140 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:34:09,141 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:34:09,141 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:34:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-11-28 07:34:09,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 07:34:09,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:09,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 07:34:09,163 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:34:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash 82807, now seen corresponding path program 1 times [2020-11-28 07:34:09,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:09,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732779016] [2020-11-28 07:34:09,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:34:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:34:09,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732779016] [2020-11-28 07:34:09,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:34:09,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:34:09,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137953851] [2020-11-28 07:34:09,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:34:09,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:34:09,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:34:09,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:09,465 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2020-11-28 07:34:09,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:34:09,555 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-11-28 07:34:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:34:09,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-28 07:34:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:34:09,567 INFO L225 Difference]: With dead ends: 24 [2020-11-28 07:34:09,568 INFO L226 Difference]: Without dead ends: 17 [2020-11-28 07:34:09,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:34:09,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-28 07:34:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2020-11-28 07:34:09,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 07:34:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-28 07:34:09,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2020-11-28 07:34:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:34:09,611 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-28 07:34:09,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:34:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-28 07:34:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:34:09,612 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:34:09,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:34:09,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:34:09,613 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 07:34:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:34:09,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2567056, now seen corresponding path program 1 times [2020-11-28 07:34:09,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:34:09,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140138344] [2020-11-28 07:34:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:34:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:34:09,652 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:34:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:34:09,689 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:34:09,716 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:34:09,719 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:34:09,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:34:09,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:34:09 BoogieIcfgContainer [2020-11-28 07:34:09,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:34:09,751 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:34:09,751 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:34:09,752 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:34:09,752 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:34:09" (3/4) ... [2020-11-28 07:34:09,754 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 07:34:09,796 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_beb26311-9eba-4426-80f7-d2c6359c479c/bin/utaipan/witness.graphml [2020-11-28 07:34:09,796 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:34:09,798 INFO L168 Benchmark]: Toolchain (without parser) took 1907.32 ms. Allocated memory is still 130.0 MB. Free memory was 102.4 MB in the beginning and 61.2 MB in the end (delta: 41.2 MB). Peak memory consumption was 38.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:09,799 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:34:09,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.74 ms. Allocated memory is still 130.0 MB. Free memory was 102.0 MB in the beginning and 107.8 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:09,800 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.68 ms. Allocated memory is still 130.0 MB. Free memory was 107.8 MB in the beginning and 106.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:09,801 INFO L168 Benchmark]: Boogie Preprocessor took 25.56 ms. Allocated memory is still 130.0 MB. Free memory was 106.2 MB in the beginning and 105.3 MB in the end (delta: 992.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:34:09,802 INFO L168 Benchmark]: RCFGBuilder took 659.80 ms. Allocated memory is still 130.0 MB. Free memory was 105.3 MB in the beginning and 88.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:09,803 INFO L168 Benchmark]: TraceAbstraction took 710.29 ms. Allocated memory is still 130.0 MB. Free memory was 87.4 MB in the beginning and 62.9 MB in the end (delta: 24.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:09,804 INFO L168 Benchmark]: Witness Printer took 45.27 ms. Allocated memory is still 130.0 MB. Free memory was 62.7 MB in the beginning and 61.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:34:09,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 81.8 MB. Free memory is still 42.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 413.74 ms. Allocated memory is still 130.0 MB. Free memory was 102.0 MB in the beginning and 107.8 MB in the end (delta: -5.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.68 ms. Allocated memory is still 130.0 MB. Free memory was 107.8 MB in the beginning and 106.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.56 ms. Allocated memory is still 130.0 MB. Free memory was 106.2 MB in the beginning and 105.3 MB in the end (delta: 992.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 659.80 ms. Allocated memory is still 130.0 MB. Free memory was 105.3 MB in the beginning and 88.0 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 710.29 ms. Allocated memory is still 130.0 MB. Free memory was 87.4 MB in the beginning and 62.9 MB in the end (delta: 24.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 45.27 ms. Allocated memory is still 130.0 MB. Free memory was 62.7 MB in the beginning and 61.2 MB in the end (delta: 1.5 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: 23]: integer overflow possible integer overflow possible We found a FailurePath: [L20] int i = __VERIFIER_nondet_int(); [L21] int j = __VERIFIER_nondet_int(); [L22] int k = __VERIFIER_nondet_int(); [L23] ii-j [L23] i-j - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 18 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 28 SDslu, 1 SDs, 0 SdLazy, 17 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, 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, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 26 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...