./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4liff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s4liff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 75cbf81488c74fc4c02939f7ad281d8c79be2b76 ................................................................................................................................................................................................................................................................................................................................................. 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 0.1.24-6b5699a [2019-11-26 02:28:30,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:28:30,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:28:30,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:28:30,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:28:30,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:28:30,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:28:30,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:28:30,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:28:30,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:28:30,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:28:30,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:28:30,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:28:30,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:28:30,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:28:30,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:28:30,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:28:30,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:28:30,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:28:30,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:28:30,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:28:30,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:28:30,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:28:30,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:28:30,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:28:30,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:28:30,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:28:30,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:28:30,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:28:30,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:28:30,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:28:30,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:28:30,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:28:30,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:28:30,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:28:30,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:28:30,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:28:30,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:28:30,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:28:30,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:28:30,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:28:30,514 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:28:30,538 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:28:30,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:28:30,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:28:30,549 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:28:30,550 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:28:30,550 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:28:30,550 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:28:30,550 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:28:30,551 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:28:30,551 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:28:30,551 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:28:30,551 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:28:30,551 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:28:30,552 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:28:30,552 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:28:30,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:28:30,553 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:28:30,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:28:30,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:28:30,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:28:30,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:28:30,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:28:30,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:28:30,555 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:28:30,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:28:30,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:28:30,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:28:30,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:28:30,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:28:30,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:28:30,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:28:30,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:28:30,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:28:30,557 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:28:30,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:28:30,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:28:30,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:28:30,558 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_1ea5e652-d1fa-4748-82d9-73c69907d22e/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(__VERIFIER_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 -> 75cbf81488c74fc4c02939f7ad281d8c79be2b76 [2019-11-26 02:28:30,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:28:30,707 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:28:30,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:28:30,711 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:28:30,711 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:28:30,711 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/../../sv-benchmarks/c/array-fpi/s4liff.c [2019-11-26 02:28:30,760 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/data/46209131e/8a6c055b1a87482a923b7a0044b13a98/FLAGdffeb035e [2019-11-26 02:28:31,179 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:28:31,180 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/sv-benchmarks/c/array-fpi/s4liff.c [2019-11-26 02:28:31,186 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/data/46209131e/8a6c055b1a87482a923b7a0044b13a98/FLAGdffeb035e [2019-11-26 02:28:31,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/data/46209131e/8a6c055b1a87482a923b7a0044b13a98 [2019-11-26 02:28:31,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:28:31,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:28:31,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:28:31,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:28:31,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:28:31,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@291cccf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31, skipping insertion in model container [2019-11-26 02:28:31,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:28:31,245 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:28:31,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:28:31,464 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:28:31,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:28:31,496 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:28:31,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31 WrapperNode [2019-11-26 02:28:31,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:28:31,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:28:31,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:28:31,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:28:31,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:28:31,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:28:31,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:28:31,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:28:31,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... [2019-11-26 02:28:31,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:28:31,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:28:31,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:28:31,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:28:31,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/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 [2019-11-26 02:28:31,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:28:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:28:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:28:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:28:31,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:28:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:28:31,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:28:32,097 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:28:32,098 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-26 02:28:32,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:28:32 BoogieIcfgContainer [2019-11-26 02:28:32,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:28:32,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:28:32,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:28:32,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:28:32,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:28:31" (1/3) ... [2019-11-26 02:28:32,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4470ce51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:28:32, skipping insertion in model container [2019-11-26 02:28:32,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:28:31" (2/3) ... [2019-11-26 02:28:32,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4470ce51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:28:32, skipping insertion in model container [2019-11-26 02:28:32,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:28:32" (3/3) ... [2019-11-26 02:28:32,108 INFO L109 eAbstractionObserver]: Analyzing ICFG s4liff.c [2019-11-26 02:28:32,117 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:28:32,123 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:28:32,133 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:28:32,158 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:28:32,158 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:28:32,158 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:28:32,158 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:28:32,159 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:28:32,159 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:28:32,159 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:28:32,159 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:28:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-26 02:28:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:28:32,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:28:32,174 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:28:32,174 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:28:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:28:32,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2054767383, now seen corresponding path program 1 times [2019-11-26 02:28:32,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:28:32,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634332170] [2019-11-26 02:28:32,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:28:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:28:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:28:32,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634332170] [2019-11-26 02:28:32,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:28:32,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:28:32,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991571] [2019-11-26 02:28:32,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:28:32,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:28:32,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:28:32,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:28:32,366 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-11-26 02:28:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:28:32,404 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2019-11-26 02:28:32,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:28:32,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-26 02:28:32,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:28:32,413 INFO L225 Difference]: With dead ends: 20 [2019-11-26 02:28:32,414 INFO L226 Difference]: Without dead ends: 9 [2019-11-26 02:28:32,416 INFO L630 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 [2019-11-26 02:28:32,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-26 02:28:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-26 02:28:32,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-26 02:28:32,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-26 02:28:32,446 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2019-11-26 02:28:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:28:32,446 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-26 02:28:32,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:28:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-26 02:28:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:28:32,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:28:32,447 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:28:32,447 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:28:32,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:28:32,447 INFO L82 PathProgramCache]: Analyzing trace with hash 471069578, now seen corresponding path program 1 times [2019-11-26 02:28:32,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:28:32,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789474705] [2019-11-26 02:28:32,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:28:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:28:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:28:32,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789474705] [2019-11-26 02:28:32,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:28:32,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:28:32,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238821633] [2019-11-26 02:28:32,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:28:32,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:28:32,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:28:32,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:28:32,515 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand 4 states. [2019-11-26 02:28:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:28:32,549 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-26 02:28:32,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:28:32,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-26 02:28:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:28:32,550 INFO L225 Difference]: With dead ends: 15 [2019-11-26 02:28:32,551 INFO L226 Difference]: Without dead ends: 11 [2019-11-26 02:28:32,551 INFO L630 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 [2019-11-26 02:28:32,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-26 02:28:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-26 02:28:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-26 02:28:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-26 02:28:32,554 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2019-11-26 02:28:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:28:32,555 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-26 02:28:32,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:28:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-26 02:28:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:28:32,555 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:28:32,555 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:28:32,556 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:28:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:28:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1674030453, now seen corresponding path program 1 times [2019-11-26 02:28:32,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:28:32,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194703921] [2019-11-26 02:28:32,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:28:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:28:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:28:32,699 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:28:32,699 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:28:32,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:28:32 BoogieIcfgContainer [2019-11-26 02:28:32,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:28:32,721 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:28:32,722 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:28:32,722 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:28:32,722 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:28:32" (3/4) ... [2019-11-26 02:28:32,724 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:28:32,789 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1ea5e652-d1fa-4748-82d9-73c69907d22e/bin/utaipan/witness.graphml [2019-11-26 02:28:32,790 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:28:32,792 INFO L168 Benchmark]: Toolchain (without parser) took 1582.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -141.6 MB). Peak memory consumption was 28.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:28:32,792 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:28:32,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -216.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:28:32,793 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:28:32,794 INFO L168 Benchmark]: Boogie Preprocessor took 24.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:28:32,794 INFO L168 Benchmark]: RCFGBuilder took 538.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:28:32,795 INFO L168 Benchmark]: TraceAbstraction took 621.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:28:32,796 INFO L168 Benchmark]: Witness Printer took 68.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2019-11-26 02:28:32,799 INFO L335 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 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 283.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 170.4 MB). Free memory was 946.1 MB in the beginning and 1.2 GB in the end (delta: -216.2 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.38 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 538.35 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 28.9 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 621.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 32.7 MB). Peak memory consumption was 32.7 MB. Max. memory is 11.5 GB. * Witness Printer took 68.38 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 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: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = N [L27] i=0 VAL [N=1] [L27] COND TRUE i