./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i --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_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i -s /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/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 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 ..................................................................................................................................................................................................................................................................... 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 11:24:45,084 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 11:24:45,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 11:24:45,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 11:24:45,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 11:24:45,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 11:24:45,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 11:24:45,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 11:24:45,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 11:24:45,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 11:24:45,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 11:24:45,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 11:24:45,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 11:24:45,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 11:24:45,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 11:24:45,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 11:24:45,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 11:24:45,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 11:24:45,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 11:24:45,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 11:24:45,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 11:24:45,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 11:24:45,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 11:24:45,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 11:24:45,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 11:24:45,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 11:24:45,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 11:24:45,120 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 11:24:45,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 11:24:45,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 11:24:45,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 11:24:45,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 11:24:45,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 11:24:45,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 11:24:45,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 11:24:45,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 11:24:45,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 11:24:45,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 11:24:45,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 11:24:45,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 11:24:45,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 11:24:45,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-10-22 11:24:45,142 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 11:24:45,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 11:24:45,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 11:24:45,147 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-22 11:24:45,147 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-22 11:24:45,147 INFO L138 SettingsManager]: * Explicit value domain=true [2019-10-22 11:24:45,148 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-10-22 11:24:45,148 INFO L138 SettingsManager]: * Octagon Domain=false [2019-10-22 11:24:45,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-10-22 11:24:45,148 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-10-22 11:24:45,148 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-10-22 11:24:45,148 INFO L138 SettingsManager]: * Interval Domain=false [2019-10-22 11:24:45,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 11:24:45,149 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 11:24:45,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 11:24:45,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 11:24:45,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 11:24:45,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 11:24:45,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 11:24:45,150 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 11:24:45,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 11:24:45,150 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 11:24:45,150 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 11:24:45,150 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 11:24:45,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 11:24:45,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 11:24:45,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 11:24:45,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 11:24:45,151 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 11:24:45,151 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 11:24:45,151 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-22 11:24:45,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 11:24:45,152 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 11:24:45,152 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-22 11:24:45,152 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_7a66812c-2894-4a78-93e8-2617d3799aea/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 -> 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 [2019-10-22 11:24:45,176 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 11:24:45,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 11:24:45,188 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 11:24:45,189 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 11:24:45,189 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 11:24:45,190 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2019-10-22 11:24:45,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/data/eb823950c/189be4cdbcb346ea929dd4fdb5a68fa6/FLAGc893ba56a [2019-10-22 11:24:45,701 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 11:24:45,708 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2019-10-22 11:24:45,717 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/data/eb823950c/189be4cdbcb346ea929dd4fdb5a68fa6/FLAGc893ba56a [2019-10-22 11:24:46,046 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/data/eb823950c/189be4cdbcb346ea929dd4fdb5a68fa6 [2019-10-22 11:24:46,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 11:24:46,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 11:24:46,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:46,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 11:24:46,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 11:24:46,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad43e70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46, skipping insertion in model container [2019-10-22 11:24:46,058 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,065 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 11:24:46,093 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 11:24:46,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:46,436 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 11:24:46,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 11:24:46,516 INFO L192 MainTranslator]: Completed translation [2019-10-22 11:24:46,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46 WrapperNode [2019-10-22 11:24:46,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 11:24:46,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:46,518 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 11:24:46,518 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 11:24:46,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,542 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 11:24:46,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 11:24:46,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 11:24:46,572 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 11:24:46,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... [2019-10-22 11:24:46,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 11:24:46,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 11:24:46,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 11:24:46,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 11:24:46,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/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 11:24:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 11:24:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-22 11:24:46,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 11:24:46,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 11:24:46,883 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 11:24:46,884 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 11:24:46,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:46 BoogieIcfgContainer [2019-10-22 11:24:46,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 11:24:46,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 11:24:46,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 11:24:46,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 11:24:46,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 11:24:46" (1/3) ... [2019-10-22 11:24:46,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a94d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:46, skipping insertion in model container [2019-10-22 11:24:46,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 11:24:46" (2/3) ... [2019-10-22 11:24:46,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72a94d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 11:24:46, skipping insertion in model container [2019-10-22 11:24:46,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:46" (3/3) ... [2019-10-22 11:24:46,893 INFO L109 eAbstractionObserver]: Analyzing ICFG PrefixDecrement.i [2019-10-22 11:24:46,903 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 11:24:46,910 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-10-22 11:24:46,921 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-10-22 11:24:46,945 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 11:24:46,945 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 11:24:46,945 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 11:24:46,945 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 11:24:46,945 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 11:24:46,946 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 11:24:46,946 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 11:24:46,946 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 11:24:46,963 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 11:24:46,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-10-22 11:24:46,982 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:46,983 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-10-22 11:24:46,985 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 11:24:46,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:46,990 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2019-10-22 11:24:46,998 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:46,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924394825] [2019-10-22 11:24:46,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:46,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:46,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 11:24:47,125 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 11:24:47,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924394825] [2019-10-22 11:24:47,126 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 11:24:47,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 11:24:47,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715976329] [2019-10-22 11:24:47,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 11:24:47,130 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-22 11:24:47,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 11:24:47,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 11:24:47,141 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-10-22 11:24:47,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 11:24:47,162 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2019-10-22 11:24:47,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 11:24:47,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-10-22 11:24:47,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 11:24:47,172 INFO L225 Difference]: With dead ends: 9 [2019-10-22 11:24:47,172 INFO L226 Difference]: Without dead ends: 5 [2019-10-22 11:24:47,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 11:24:47,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2019-10-22 11:24:47,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-10-22 11:24:47,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 11:24:47,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2019-10-22 11:24:47,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 3 [2019-10-22 11:24:47,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 11:24:47,203 INFO L462 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2019-10-22 11:24:47,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 11:24:47,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2019-10-22 11:24:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-10-22 11:24:47,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 11:24:47,204 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-10-22 11:24:47,204 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 11:24:47,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 11:24:47,205 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2019-10-22 11:24:47,205 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-22 11:24:47,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474576073] [2019-10-22 11:24:47,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:47,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 11:24:47,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 11:24:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:24:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 11:24:47,248 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-22 11:24:47,248 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 11:24:47,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 11:24:47 BoogieIcfgContainer [2019-10-22 11:24:47,268 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 11:24:47,269 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 11:24:47,269 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 11:24:47,269 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 11:24:47,271 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 11:24:46" (3/4) ... [2019-10-22 11:24:47,273 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 11:24:47,317 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_7a66812c-2894-4a78-93e8-2617d3799aea/bin/utaipan/witness.graphml [2019-10-22 11:24:47,317 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 11:24:47,319 INFO L168 Benchmark]: Toolchain (without parser) took 1269.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 936.9 MB in the beginning and 1.1 GB in the end (delta: -144.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:47,319 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 957.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 11:24:47,320 INFO L168 Benchmark]: CACSL2BoogieTranslator took 467.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 936.9 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:47,320 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.38 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:47,321 INFO L168 Benchmark]: Boogie Preprocessor took 25.45 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:47,321 INFO L168 Benchmark]: RCFGBuilder took 287.96 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:47,323 INFO L168 Benchmark]: TraceAbstraction took 382.29 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: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:47,323 INFO L168 Benchmark]: Witness Printer took 48.57 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 11:24:47,327 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 957.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 467.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 936.9 MB in the beginning and 1.1 GB in the end (delta: -189.8 MB). Peak memory consumption was 22.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 53.38 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.45 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 287.96 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: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 382.29 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: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Witness Printer took 48.57 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 333]: integer overflow possible integer overflow possible We found a FailurePath: [L332] int x = -2147483647 - 1; [L333] --x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 2 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...