./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ncompf.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_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ncompf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/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 c18491048038839cd2bebabad98c6df95c5a2283 .............................................................................................................................................................................................................................................................................................................. 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 19:55:10,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:55:10,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:55:10,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:55:10,298 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:55:10,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:55:10,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:55:10,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:55:10,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:55:10,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:55:10,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:55:10,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:55:10,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:55:10,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:55:10,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:55:10,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:55:10,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:55:10,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:55:10,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:55:10,345 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:55:10,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:55:10,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:55:10,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:55:10,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:55:10,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:55:10,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:55:10,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:55:10,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:55:10,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:55:10,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:55:10,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:55:10,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:55:10,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:55:10,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:55:10,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:55:10,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:55:10,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:55:10,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:55:10,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:55:10,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:55:10,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:55:10,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:55:10,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:55:10,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:55:10,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:55:10,435 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:55:10,435 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:55:10,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:55:10,436 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:55:10,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:55:10,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:55:10,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:55:10,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:55:10,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:55:10,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:55:10,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:55:10,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:55:10,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:55:10,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:55:10,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:55:10,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:55:10,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:55:10,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:55:10,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:55:10,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:55:10,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:55:10,442 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:55:10,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:55:10,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:55:10,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:55:10,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:55:10,443 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_47523c06-2a66-4daf-8d60-b9fec442728c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c18491048038839cd2bebabad98c6df95c5a2283 [2020-11-29 19:55:10,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:55:10,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:55:10,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:55:10,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:55:10,811 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:55:10,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ncompf.c [2020-11-29 19:55:10,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/data/987aedbef/3ddda385dc854e20818ba8feaec29c20/FLAGf0223b9e7 [2020-11-29 19:55:11,434 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:55:11,435 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/sv-benchmarks/c/array-fpi/ncompf.c [2020-11-29 19:55:11,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/data/987aedbef/3ddda385dc854e20818ba8feaec29c20/FLAGf0223b9e7 [2020-11-29 19:55:11,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/data/987aedbef/3ddda385dc854e20818ba8feaec29c20 [2020-11-29 19:55:11,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:55:11,775 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:55:11,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:55:11,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:55:11,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:55:11,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:55:11" (1/1) ... [2020-11-29 19:55:11,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@388c97b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:11, skipping insertion in model container [2020-11-29 19:55:11,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:55:11" (1/1) ... [2020-11-29 19:55:11,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:55:11,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:55:12,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:55:12,086 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:55:12,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:55:12,158 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:55:12,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12 WrapperNode [2020-11-29 19:55:12,164 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:55:12,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:55:12,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:55:12,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:55:12,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:55:12,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:55:12,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:55:12,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:55:12,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... [2020-11-29 19:55:12,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:55:12,298 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:55:12,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:55:12,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:55:12,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/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 19:55:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:55:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:55:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:55:12,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 19:55:12,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:55:12,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:55:12,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:55:12,943 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:55:12,944 INFO L298 CfgBuilder]: Removed 14 assume(true) statements. [2020-11-29 19:55:12,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:55:12 BoogieIcfgContainer [2020-11-29 19:55:12,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:55:12,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:55:12,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:55:12,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:55:12,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:55:11" (1/3) ... [2020-11-29 19:55:12,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50699056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:55:12, skipping insertion in model container [2020-11-29 19:55:12,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:55:12" (2/3) ... [2020-11-29 19:55:12,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50699056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:55:12, skipping insertion in model container [2020-11-29 19:55:12,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:55:12" (3/3) ... [2020-11-29 19:55:12,957 INFO L111 eAbstractionObserver]: Analyzing ICFG ncompf.c [2020-11-29 19:55:12,970 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:55:12,975 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 19:55:12,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 19:55:13,015 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:55:13,015 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:55:13,015 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:55:13,016 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:55:13,016 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:55:13,016 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:55:13,016 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:55:13,016 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:55:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-29 19:55:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:55:13,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:55:13,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:55:13,038 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:55:13,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:55:13,045 INFO L82 PathProgramCache]: Analyzing trace with hash -592971038, now seen corresponding path program 1 times [2020-11-29 19:55:13,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:55:13,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701205928] [2020-11-29 19:55:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:55:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:55:13,201 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 19:55:13,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701205928] [2020-11-29 19:55:13,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:55:13,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:55:13,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320073981] [2020-11-29 19:55:13,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:55:13,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:55:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:55:13,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:55:13,226 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-11-29 19:55:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:55:13,244 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2020-11-29 19:55:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:55:13,245 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-11-29 19:55:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:55:13,255 INFO L225 Difference]: With dead ends: 45 [2020-11-29 19:55:13,255 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 19:55:13,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:55:13,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 19:55:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-29 19:55:13,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 19:55:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-29 19:55:13,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-11-29 19:55:13,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:55:13,295 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-29 19:55:13,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:55:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-29 19:55:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 19:55:13,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:55:13,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:55:13,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:55:13,297 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 19:55:13,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:55:13,298 INFO L82 PathProgramCache]: Analyzing trace with hash 108093540, now seen corresponding path program 1 times [2020-11-29 19:55:13,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:55:13,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347842495] [2020-11-29 19:55:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:55:13,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 19:55:13,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21757723] [2020-11-29 19:55:13,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 19:55:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:55:13,472 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:55:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:55:13,503 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:55:13,570 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:55:13,571 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:55:13,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-29 19:55:13,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:55:13 BoogieIcfgContainer [2020-11-29 19:55:13,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:55:13,876 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:55:13,876 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:55:13,876 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:55:13,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:55:12" (3/4) ... [2020-11-29 19:55:13,878 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:55:13,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_47523c06-2a66-4daf-8d60-b9fec442728c/bin/uautomizer/witness.graphml [2020-11-29 19:55:13,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:55:13,963 INFO L168 Benchmark]: Toolchain (without parser) took 2186.19 ms. Allocated memory is still 104.9 MB. Free memory was 75.6 MB in the beginning and 78.3 MB in the end (delta: -2.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:55:13,963 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:55:13,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.02 ms. Allocated memory is still 104.9 MB. Free memory was 75.6 MB in the beginning and 80.5 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:13,964 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.37 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 78.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:13,965 INFO L168 Benchmark]: Boogie Preprocessor took 60.26 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:13,966 INFO L168 Benchmark]: RCFGBuilder took 648.53 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 61.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:13,966 INFO L168 Benchmark]: TraceAbstraction took 927.34 ms. Allocated memory is still 104.9 MB. Free memory was 60.9 MB in the beginning and 80.8 MB in the end (delta: -19.9 MB). Peak memory consumption was 35.8 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:13,967 INFO L168 Benchmark]: Witness Printer took 84.68 ms. Allocated memory is still 104.9 MB. Free memory was 80.8 MB in the beginning and 78.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:55:13,971 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 73.4 MB. Free memory is still 36.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 387.02 ms. Allocated memory is still 104.9 MB. Free memory was 75.6 MB in the beginning and 80.5 MB in the end (delta: -4.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.37 ms. Allocated memory is still 104.9 MB. Free memory was 80.5 MB in the beginning and 78.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.26 ms. Allocated memory is still 104.9 MB. Free memory was 78.9 MB in the beginning and 77.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 648.53 ms. Allocated memory is still 104.9 MB. Free memory was 77.7 MB in the beginning and 61.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 927.34 ms. Allocated memory is still 104.9 MB. Free memory was 60.9 MB in the beginning and 80.8 MB in the end (delta: -19.9 MB). Peak memory consumption was 35.8 MB. Max. memory is 16.1 GB. * Witness Printer took 84.68 ms. Allocated memory is still 104.9 MB. Free memory was 80.8 MB in the beginning and 78.3 MB in the end (delta: 2.5 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: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L30] long long *c = malloc(sizeof(long long)*N); [L32] a[0] = 6 [L33] b[0] = 1 [L34] c[0] = 0 [L35] i=1 VAL [N=1] [L35] COND FALSE !(i