./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/Cairo_nondet.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/Cairo_nondet.c -s /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash de94f0c7b8482738d507216e71ac3b33c5f9a9e3 ................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 11:21:02,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:21:02,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:21:02,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:21:02,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:21:02,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:21:02,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:21:02,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:21:02,612 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:21:02,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:21:02,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:21:02,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:21:02,624 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:21:02,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:21:02,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:21:02,627 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:21:02,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:21:02,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:21:02,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:21:02,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:21:02,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:21:02,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:21:02,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:21:02,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:21:02,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:21:02,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:21:02,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:21:02,644 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:21:02,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:21:02,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:21:02,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:21:02,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:21:02,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:21:02,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:21:02,650 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:21:02,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:21:02,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:21:02,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:21:02,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:21:02,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:21:02,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:21:02,655 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-10-22 11:21:02,666 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:21:02,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:21:02,674 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:21:02,674 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:21:02,675 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:21:02,675 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:21:02,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:21:02,675 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:21:02,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:21:02,675 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:21:02,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:21:02,676 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:21:02,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:21:02,676 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:21:02,677 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:21:02,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:21:02,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:21:02,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:21:02,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:21:02,677 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 11:21:02,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:21:02,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:21:02,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:21:02,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:21:02,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:21:02,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:21:02,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:21:02,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:21:02,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:21:02,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:21:02,679 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:21:02,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:21:02,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:21:02,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:21:02,680 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/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de94f0c7b8482738d507216e71ac3b33c5f9a9e3 [2019-10-22 11:21:02,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:21:02,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:21:02,717 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:21:02,719 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:21:02,719 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:21:02,720 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/../../sv-benchmarks/c/termination-crafted/Cairo_nondet.c [2019-10-22 11:21:02,771 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/data/86e3684e1/c4273f4bdf6e426ca3077796adbc41dd/FLAGec44c87f5 [2019-10-22 11:21:03,113 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:21:03,115 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/sv-benchmarks/c/termination-crafted/Cairo_nondet.c [2019-10-22 11:21:03,121 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/data/86e3684e1/c4273f4bdf6e426ca3077796adbc41dd/FLAGec44c87f5 [2019-10-22 11:21:03,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/data/86e3684e1/c4273f4bdf6e426ca3077796adbc41dd [2019-10-22 11:21:03,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:21:03,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:21:03,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:03,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:21:03,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:21:03,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3930d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03, skipping insertion in model container [2019-10-22 11:21:03,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,556 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:21:03,568 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:21:03,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:03,701 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:21:03,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:21:03,788 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:21:03,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03 WrapperNode [2019-10-22 11:21:03,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:21:03,790 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:03,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:21:03,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:21:03,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,802 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:21:03,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:21:03,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:21:03,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:21:03,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... [2019-10-22 11:21:03,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:21:03,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:21:03,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:21:03,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:21:03,844 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/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 [2019-10-22 11:21:03,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:21:03,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:21:04,070 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:21:04,070 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-22 11:21:04,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:04 BoogieIcfgContainer [2019-10-22 11:21:04,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:21:04,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:21:04,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:21:04,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:21:04,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:21:03" (1/3) ... [2019-10-22 11:21:04,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2624be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:04, skipping insertion in model container [2019-10-22 11:21:04,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:21:03" (2/3) ... [2019-10-22 11:21:04,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f2624be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:21:04, skipping insertion in model container [2019-10-22 11:21:04,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:04" (3/3) ... [2019-10-22 11:21:04,084 INFO L109 eAbstractionObserver]: Analyzing ICFG Cairo_nondet.c [2019-10-22 11:21:04,095 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:21:04,102 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-10-22 11:21:04,115 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-10-22 11:21:04,138 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:21:04,138 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:21:04,138 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:21:04,139 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:21:04,139 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:21:04,139 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:21:04,139 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:21:04,139 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:21:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-10-22 11:21:04,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:21:04,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:04,157 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:21:04,159 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 11:21:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash 957573, now seen corresponding path program 1 times [2019-10-22 11:21:04,172 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:04,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915397259] [2019-10-22 11:21:04,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:04,173 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:04,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:04,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:04,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915397259] [2019-10-22 11:21:04,310 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:04,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-10-22 11:21:04,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233943704] [2019-10-22 11:21:04,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:21:04,318 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:04,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:21:04,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:04,335 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-10-22 11:21:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:04,478 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-10-22 11:21:04,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:21:04,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-10-22 11:21:04,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:04,495 INFO L225 Difference]: With dead ends: 15 [2019-10-22 11:21:04,495 INFO L226 Difference]: Without dead ends: 6 [2019-10-22 11:21:04,498 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:21:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2019-10-22 11:21:04,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-10-22 11:21:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-10-22 11:21:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2019-10-22 11:21:04,551 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2019-10-22 11:21:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:04,552 INFO L462 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2019-10-22 11:21:04,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:21:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2019-10-22 11:21:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 11:21:04,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:04,552 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 11:21:04,553 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 11:21:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash 29684810, now seen corresponding path program 1 times [2019-10-22 11:21:04,553 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:04,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592888277] [2019-10-22 11:21:04,553 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:04,555 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:04,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:04,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:21:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 11:21:04,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592888277] [2019-10-22 11:21:04,610 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:21:04,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:21:04,611 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356739351] [2019-10-22 11:21:04,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 11:21:04,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:21:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 11:21:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:04,613 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 4 states. [2019-10-22 11:21:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:21:04,636 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-10-22 11:21:04,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 11:21:04,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-10-22 11:21:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:21:04,637 INFO L225 Difference]: With dead ends: 10 [2019-10-22 11:21:04,638 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 11:21:04,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-22 11:21:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 11:21:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 11:21:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 11:21:04,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-10-22 11:21:04,641 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2019-10-22 11:21:04,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:21:04,642 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-10-22 11:21:04,642 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 11:21:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-10-22 11:21:04,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 11:21:04,642 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:21:04,642 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2019-10-22 11:21:04,643 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 11:21:04,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:21:04,643 INFO L82 PathProgramCache]: Analyzing trace with hash -423045501, now seen corresponding path program 1 times [2019-10-22 11:21:04,643 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:21:04,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311544771] [2019-10-22 11:21:04,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:04,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:21:04,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:21:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:21:04,682 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:21:04,683 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:21:04,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:21:04 BoogieIcfgContainer [2019-10-22 11:21:04,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:21:04,706 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:21:04,706 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:21:04,706 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:21:04,707 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:21:04" (3/4) ... [2019-10-22 11:21:04,708 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:21:04,736 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_daf7699c-bc92-4375-a0aa-01ff7041d951/bin/utaipan/witness.graphml [2019-10-22 11:21:04,737 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:21:04,739 INFO L168 Benchmark]: Toolchain (without parser) took 1196.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -156.9 MB). Peak memory consumption was 8.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:04,739 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:04,740 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 949.9 MB in the beginning and 1.2 GB in the end (delta: -205.5 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:04,740 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.03 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. [2019-10-22 11:21:04,740 INFO L168 Benchmark]: Boogie Preprocessor took 23.12 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. [2019-10-22 11:21:04,741 INFO L168 Benchmark]: RCFGBuilder took 229.17 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: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:04,741 INFO L168 Benchmark]: TraceAbstraction took 633.11 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: 34.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 11.5 GB. [2019-10-22 11:21:04,742 INFO L168 Benchmark]: Witness Printer took 30.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:21:04,744 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 246.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.2 MB). Free memory was 949.9 MB in the beginning and 1.2 GB in the end (delta: -205.5 MB). Peak memory consumption was 22.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.03 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 23.12 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 229.17 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: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 633.11 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: 34.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 11.5 GB. * Witness Printer took 30.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: integer overflow possible integer overflow possible We found a FailurePath: [L13] int x; [L14] x = __VERIFIER_nondet_int() [L15] COND TRUE x > __VERIFIER_nondet_int() [L16] COND TRUE x != 0 [L17] EXPR x - 1 [L17] x = x - 1 [L16] COND TRUE x != 0 [L17] x - 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 6 SDtfs, 7 SDslu, 1 SDs, 0 SdLazy, 20 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 107 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...