./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ms2f.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_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ms2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ab1941c3f1e3ccfc453cc61b57def578295cf9b5 .................................................................................................................................................................................................................................................................................................................................................... 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 [2020-11-22 13:07:45,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:07:45,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:07:45,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:07:45,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:07:45,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:07:45,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:07:45,609 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:07:45,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:07:45,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:07:45,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:07:45,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:07:45,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:07:45,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:07:45,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:07:45,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:07:45,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:07:45,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:07:45,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:07:45,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:07:45,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:07:45,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:07:45,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:07:45,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:07:45,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:07:45,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:07:45,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:07:45,660 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:07:45,660 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:07:45,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:07:45,662 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:07:45,663 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:07:45,665 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:07:45,666 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:07:45,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:07:45,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:07:45,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:07:45,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:07:45,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:07:45,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:07:45,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:07:45,675 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-22 13:07:45,716 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:07:45,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:07:45,718 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:07:45,718 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:07:45,719 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:07:45,719 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:07:45,719 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:07:45,719 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:07:45,719 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:07:45,720 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:07:45,721 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:07:45,721 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:07:45,721 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:07:45,721 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:07:45,722 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:07:45,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:07:45,723 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-22 13:07:45,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:07:45,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-22 13:07:45,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:07:45,723 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:07:45,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:07:45,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:07:45,724 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-22 13:07:45,724 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-22 13:07:45,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:07:45,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:07:45,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:07:45,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:07:45,725 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:07:45,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:07:45,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:07:45,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:07:45,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:07:45,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:07:45,727 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:07:45,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:07:45,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:07:45,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:07:45,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:07:45,728 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_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab1941c3f1e3ccfc453cc61b57def578295cf9b5 [2020-11-22 13:07:46,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:07:46,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:07:46,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:07:46,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:07:46,099 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:07:46,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/../../sv-benchmarks/c/array-fpi/ms2f.c [2020-11-22 13:07:46,188 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/data/663ece806/58d4912217db403888831432de680d7d/FLAG2091bb50d [2020-11-22 13:07:46,704 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:07:46,705 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/sv-benchmarks/c/array-fpi/ms2f.c [2020-11-22 13:07:46,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/data/663ece806/58d4912217db403888831432de680d7d/FLAG2091bb50d [2020-11-22 13:07:47,088 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/data/663ece806/58d4912217db403888831432de680d7d [2020-11-22 13:07:47,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:07:47,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:07:47,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:47,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:07:47,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:07:47,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,100 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1868cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47, skipping insertion in model container [2020-11-22 13:07:47,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:07:47,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:07:47,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:47,381 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:07:47,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:07:47,414 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:07:47,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47 WrapperNode [2020-11-22 13:07:47,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:07:47,416 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:47,416 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:07:47,416 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:07:47,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,431 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:07:47,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:07:47,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:07:47,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:07:47,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... [2020-11-22 13:07:47,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:07:47,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:07:47,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:07:47,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:07:47,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/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 [2020-11-22 13:07:47,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 13:07:47,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 13:07:47,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-22 13:07:47,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-22 13:07:47,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:07:47,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:07:47,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-22 13:07:47,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-22 13:07:48,241 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:07:48,241 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-22 13:07:48,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:48 BoogieIcfgContainer [2020-11-22 13:07:48,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:07:48,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:07:48,245 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:07:48,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:07:48,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:07:47" (1/3) ... [2020-11-22 13:07:48,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7b2e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:48, skipping insertion in model container [2020-11-22 13:07:48,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:07:47" (2/3) ... [2020-11-22 13:07:48,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f7b2e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:07:48, skipping insertion in model container [2020-11-22 13:07:48,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:48" (3/3) ... [2020-11-22 13:07:48,253 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-11-22 13:07:48,264 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:07:48,268 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-22 13:07:48,279 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-22 13:07:48,312 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:07:48,312 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:07:48,312 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:07:48,312 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:07:48,313 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:07:48,313 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:07:48,313 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:07:48,313 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:07:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-22 13:07:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-22 13:07:48,332 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:48,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-22 13:07:48,333 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:48,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1531394930, now seen corresponding path program 1 times [2020-11-22 13:07:48,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:48,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235284737] [2020-11-22 13:07:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:07:48,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235284737] [2020-11-22 13:07:48,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:48,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:07:48,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900321639] [2020-11-22 13:07:48,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 13:07:48,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:48,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 13:07:48,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:48,566 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-11-22 13:07:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:48,603 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-11-22 13:07:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 13:07:48,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-22 13:07:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:48,614 INFO L225 Difference]: With dead ends: 18 [2020-11-22 13:07:48,614 INFO L226 Difference]: Without dead ends: 8 [2020-11-22 13:07:48,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 13:07:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-22 13:07:48,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-22 13:07:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-22 13:07:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-22 13:07:48,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-11-22 13:07:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:48,657 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-22 13:07:48,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 13:07:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-11-22 13:07:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-22 13:07:48,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:48,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:48,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:07:48,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:48,660 INFO L82 PathProgramCache]: Analyzing trace with hash -235910989, now seen corresponding path program 1 times [2020-11-22 13:07:48,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:48,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439656782] [2020-11-22 13:07:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:07:48,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-22 13:07:48,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439656782] [2020-11-22 13:07:48,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:07:48,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-22 13:07:48,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064617329] [2020-11-22 13:07:48,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:07:48,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:07:48,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:07:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:07:48,769 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-11-22 13:07:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:07:48,799 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-22 13:07:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:07:48,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-22 13:07:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:07:48,801 INFO L225 Difference]: With dead ends: 12 [2020-11-22 13:07:48,801 INFO L226 Difference]: Without dead ends: 9 [2020-11-22 13:07:48,802 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 [2020-11-22 13:07:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-22 13:07:48,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-22 13:07:48,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-22 13:07:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-22 13:07:48,805 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-11-22 13:07:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:07:48,805 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-22 13:07:48,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:07:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-22 13:07:48,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-22 13:07:48,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:07:48,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-22 13:07:48,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:07:48,810 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-22 13:07:48,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:07:48,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1276654522, now seen corresponding path program 1 times [2020-11-22 13:07:48,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:07:48,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073478303] [2020-11-22 13:07:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:07:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:07:48,904 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:07:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:07:48,949 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:07:48,979 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:07:48,979 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:07:48,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-22 13:07:49,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:07:49 BoogieIcfgContainer [2020-11-22 13:07:49,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:07:49,023 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:07:49,023 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:07:49,024 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:07:49,024 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:07:48" (3/4) ... [2020-11-22 13:07:49,028 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:07:49,077 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_92dad307-ad46-4cc5-b52e-e3fadfdb5b79/bin/utaipan/witness.graphml [2020-11-22 13:07:49,077 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:07:49,079 INFO L168 Benchmark]: Toolchain (without parser) took 1985.76 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 61.9 MB in the beginning and 70.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 13.8 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:49,079 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 48.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:49,080 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.58 ms. Allocated memory is still 92.3 MB. Free memory was 61.7 MB in the beginning and 69.6 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:49,081 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.29 ms. Allocated memory is still 92.3 MB. Free memory was 69.6 MB in the beginning and 68.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:49,081 INFO L168 Benchmark]: Boogie Preprocessor took 26.07 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:49,082 INFO L168 Benchmark]: RCFGBuilder took 764.72 ms. Allocated memory is still 92.3 MB. Free memory was 66.7 MB in the beginning and 43.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:49,083 INFO L168 Benchmark]: TraceAbstraction took 777.61 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 43.2 MB in the beginning and 72.2 MB in the end (delta: -29.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:07:49,083 INFO L168 Benchmark]: Witness Printer took 53.75 ms. Allocated memory is still 115.3 MB. Free memory was 72.2 MB in the beginning and 70.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:07:49,087 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 92.3 MB. Free memory is still 48.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.58 ms. Allocated memory is still 92.3 MB. Free memory was 61.7 MB in the beginning and 69.6 MB in the end (delta: -7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.29 ms. Allocated memory is still 92.3 MB. Free memory was 69.6 MB in the beginning and 68.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.07 ms. Allocated memory is still 92.3 MB. Free memory was 68.4 MB in the beginning and 67.2 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 764.72 ms. Allocated memory is still 92.3 MB. Free memory was 66.7 MB in the beginning and 43.6 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 777.61 ms. Allocated memory was 92.3 MB in the beginning and 115.3 MB in the end (delta: 23.1 MB). Free memory was 43.2 MB in the beginning and 72.2 MB in the end (delta: -29.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 53.75 ms. Allocated memory is still 115.3 MB. Free memory was 72.2 MB in the beginning and 70.1 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: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i