./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/nec20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/nec20.c -s /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b24dfa0dd4504b10530e4ddbc9574e106897fa2d .................................................................................................................................................................................................................................................................................................................................. 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-a4ecdab [2020-11-29 23:55:31,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:55:31,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:55:31,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:55:31,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:55:31,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:55:31,279 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:55:31,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:55:31,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:55:31,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:55:31,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:55:31,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:55:31,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:55:31,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:55:31,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:55:31,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:55:31,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:55:31,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:55:31,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:55:31,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:55:31,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:55:31,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:55:31,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:55:31,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:55:31,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:55:31,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:55:31,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:55:31,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:55:31,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:55:31,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:55:31,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:55:31,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:55:31,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:55:31,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:55:31,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:55:31,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:55:31,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:55:31,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:55:31,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:55:31,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:55:31,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:55:31,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:55:31,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:55:31,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:55:31,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:55:31,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:55:31,362 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:55:31,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:55:31,363 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:55:31,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:55:31,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:55:31,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:55:31,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:55:31,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:55:31,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:55:31,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:55:31,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:55:31,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:55:31,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:55:31,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:55:31,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:55:31,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:55:31,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:55:31,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:55:31,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:55:31,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:55:31,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:55:31,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:55:31,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:55:31,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:55:31,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:55:31,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b24dfa0dd4504b10530e4ddbc9574e106897fa2d [2020-11-29 23:55:31,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:55:31,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:55:31,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:55:31,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:55:31,686 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:55:31,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/../../sv-benchmarks/c/loops/nec20.c [2020-11-29 23:55:31,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/data/de794d26d/f4a99d7646dd485a9138f8b8636c07cf/FLAG664fbf843 [2020-11-29 23:55:32,260 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:55:32,261 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/sv-benchmarks/c/loops/nec20.c [2020-11-29 23:55:32,267 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/data/de794d26d/f4a99d7646dd485a9138f8b8636c07cf/FLAG664fbf843 [2020-11-29 23:55:32,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/data/de794d26d/f4a99d7646dd485a9138f8b8636c07cf [2020-11-29 23:55:32,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:55:32,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:55:32,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:32,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:55:32,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:55:32,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:32,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f93370b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32, skipping insertion in model container [2020-11-29 23:55:32,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:32,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:55:32,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:55:32,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:32,936 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:55:32,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:55:32,985 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:55:32,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32 WrapperNode [2020-11-29 23:55:32,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:55:32,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:32,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:55:32,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:55:32,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:55:33,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:55:33,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:55:33,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:55:33,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... [2020-11-29 23:55:33,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:55:33,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:55:33,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:55:33,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:55:33,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/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 [2020-11-29 23:55:33,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:55:33,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:55:33,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:55:33,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:55:33,542 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:55:33,542 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 23:55:33,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:33 BoogieIcfgContainer [2020-11-29 23:55:33,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:55:33,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:55:33,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:55:33,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:55:33,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:55:32" (1/3) ... [2020-11-29 23:55:33,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bc217d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:33, skipping insertion in model container [2020-11-29 23:55:33,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:55:32" (2/3) ... [2020-11-29 23:55:33,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bc217d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:55:33, skipping insertion in model container [2020-11-29 23:55:33,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:33" (3/3) ... [2020-11-29 23:55:33,555 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-11-29 23:55:33,565 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:55:33,570 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:55:33,581 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:55:33,616 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:55:33,616 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:55:33,616 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:55:33,616 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:55:33,617 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:55:33,617 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:55:33,617 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:55:33,617 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:55:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-11-29 23:55:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:55:33,637 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,638 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:33,638 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:33,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:33,647 INFO L82 PathProgramCache]: Analyzing trace with hash -592064849, now seen corresponding path program 1 times [2020-11-29 23:55:33,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:33,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613360326] [2020-11-29 23:55:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:33,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613360326] [2020-11-29 23:55:33,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:33,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:33,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685771045] [2020-11-29 23:55:33,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:55:33,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:33,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:33,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:33,892 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-11-29 23:55:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:33,949 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2020-11-29 23:55:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:33,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-29 23:55:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:33,959 INFO L225 Difference]: With dead ends: 44 [2020-11-29 23:55:33,960 INFO L226 Difference]: Without dead ends: 18 [2020-11-29 23:55:33,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-29 23:55:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2020-11-29 23:55:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 23:55:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-29 23:55:33,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2020-11-29 23:55:33,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:33,996 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-29 23:55:33,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:55:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-11-29 23:55:33,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 23:55:33,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:33,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:33,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:55:33,998 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1182942513, now seen corresponding path program 1 times [2020-11-29 23:55:34,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:34,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400190312] [2020-11-29 23:55:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:55:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:55:34,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400190312] [2020-11-29 23:55:34,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:55:34,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:55:34,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495340425] [2020-11-29 23:55:34,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:55:34,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:55:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:55:34,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:55:34,237 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-11-29 23:55:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:55:34,311 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-11-29 23:55:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:55:34,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-11-29 23:55:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:55:34,313 INFO L225 Difference]: With dead ends: 23 [2020-11-29 23:55:34,313 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 23:55:34,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 23:55:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 23:55:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 11. [2020-11-29 23:55:34,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 23:55:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-29 23:55:34,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2020-11-29 23:55:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:55:34,318 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-29 23:55:34,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:55:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-29 23:55:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 23:55:34,318 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:55:34,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:55:34,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:55:34,319 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:55:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:55:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1172475752, now seen corresponding path program 1 times [2020-11-29 23:55:34,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:55:34,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404641057] [2020-11-29 23:55:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:55:34,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:34,370 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:55:34,411 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:55:34,447 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:55:34,447 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:55:34,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:55:34,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:55:34 BoogieIcfgContainer [2020-11-29 23:55:34,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:55:34,481 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:55:34,482 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:55:34,484 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:55:34,485 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:55:33" (3/4) ... [2020-11-29 23:55:34,487 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:55:34,558 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_cb54ba4d-5026-412b-9137-650a0fc255d0/bin/uautomizer/witness.graphml [2020-11-29 23:55:34,558 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:55:34,560 INFO L168 Benchmark]: Toolchain (without parser) took 1907.76 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 66.1 MB in the beginning and 118.0 MB in the end (delta: -51.9 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:34,561 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 102.8 MB. Free memory is still 82.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:34,561 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.58 ms. Allocated memory is still 102.8 MB. Free memory was 65.9 MB in the beginning and 79.1 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:34,562 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 102.8 MB. Free memory was 79.1 MB in the beginning and 77.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:34,562 INFO L168 Benchmark]: Boogie Preprocessor took 29.10 ms. Allocated memory is still 102.8 MB. Free memory was 77.7 MB in the beginning and 76.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:55:34,563 INFO L168 Benchmark]: RCFGBuilder took 476.99 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 64.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:34,563 INFO L168 Benchmark]: TraceAbstraction took 935.93 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 63.8 MB in the beginning and 120.1 MB in the end (delta: -56.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:34,564 INFO L168 Benchmark]: Witness Printer took 77.04 ms. Allocated memory is still 157.3 MB. Free memory was 120.1 MB in the beginning and 118.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:55:34,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 102.8 MB. Free memory is still 82.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 332.58 ms. Allocated memory is still 102.8 MB. Free memory was 65.9 MB in the beginning and 79.1 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 102.8 MB. Free memory was 79.1 MB in the beginning and 77.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.10 ms. Allocated memory is still 102.8 MB. Free memory was 77.7 MB in the beginning and 76.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 476.99 ms. Allocated memory is still 102.8 MB. Free memory was 76.5 MB in the beginning and 64.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 935.93 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 63.8 MB in the beginning and 120.1 MB in the end (delta: -56.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 16.1 GB. * Witness Printer took 77.04 ms. Allocated memory is still 157.3 MB. Free memory was 120.1 MB in the beginning and 118.0 MB in the end (delta: 2.1 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: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int b; VAL [b=0] [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; VAL [b=0] [L19] COND TRUE \read(k) [L20] n=0 VAL [b=0] [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) VAL [b=0] [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 VAL [b=0] [L30] COND FALSE !(i <= n) VAL [b=0] [L35] a[i]=0 [L7] COND TRUE !(cond) VAL [b=0] [L3] __assert_fail("0", "nec20.c", 3, "reach_error") VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 27 SDslu, 35 SDs, 0 SdLazy, 26 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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, 2 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 528 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...