./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/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 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 .................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-26 02:49:48,692 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:49:48,694 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:49:48,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:49:48,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:49:48,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:49:48,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:49:48,719 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:49:48,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:49:48,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:49:48,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:49:48,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:49:48,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:49:48,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:49:48,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:49:48,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:49:48,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:49:48,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:49:48,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:49:48,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:49:48,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:49:48,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:49:48,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:49:48,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:49:48,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:49:48,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:49:48,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:49:48,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:49:48,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:49:48,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:49:48,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:49:48,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:49:48,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:49:48,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:49:48,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:49:48,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:49:48,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:49:48,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:49:48,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:49:48,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:49:48,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:49:48,761 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2019-11-26 02:49:48,785 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:49:48,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:49:48,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:49:48,786 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:49:48,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:49:48,786 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:49:48,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:49:48,787 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:49:48,787 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:49:48,787 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:49:48,787 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:49:48,787 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:49:48,788 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:49:48,788 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:49:48,788 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:49:48,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:49:48,789 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:49:48,789 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:49:48,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:49:48,789 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:49:48,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:49:48,790 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:49:48,790 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:49:48,790 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:49:48,790 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:49:48,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:49:48,790 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:49:48,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:49:48,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:49:48,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:49:48,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:49:48,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:49:48,804 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:49:48,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:49:48,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:49:48,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:49:48,804 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_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/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 -> 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 [2019-11-26 02:49:48,955 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:49:48,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:49:48,968 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:49:48,969 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:49:48,970 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:49:48,970 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2019-11-26 02:49:49,023 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/data/2fae11013/e3f2e555c607418aa3e491bf978e09f6/FLAGfe0d65a79 [2019-11-26 02:49:49,434 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:49:49,435 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2019-11-26 02:49:49,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/data/2fae11013/e3f2e555c607418aa3e491bf978e09f6/FLAGfe0d65a79 [2019-11-26 02:49:49,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/data/2fae11013/e3f2e555c607418aa3e491bf978e09f6 [2019-11-26 02:49:49,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:49:49,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:49:49,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:49:49,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:49:49,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:49:49,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:49:49" (1/1) ... [2019-11-26 02:49:49,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d36c5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:49, skipping insertion in model container [2019-11-26 02:49:49,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:49:49" (1/1) ... [2019-11-26 02:49:49,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:49:49,866 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:49:49,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:49:49,990 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:49:50,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:49:50,082 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:49:50,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50 WrapperNode [2019-11-26 02:49:50,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:49:50,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:49:50,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:49:50,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:49:50,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:49:50,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:49:50,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:49:50,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:49:50,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... [2019-11-26 02:49:50,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:49:50,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:49:50,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:49:50,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:49:50,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/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 02:49:50,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:49:50,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:49:50,401 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:49:50,401 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-26 02:49:50,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:50 BoogieIcfgContainer [2019-11-26 02:49:50,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:49:50,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:49:50,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:49:50,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:49:50,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:49:49" (1/3) ... [2019-11-26 02:49:50,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b60232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:49:50, skipping insertion in model container [2019-11-26 02:49:50,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:49:50" (2/3) ... [2019-11-26 02:49:50,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b60232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:49:50, skipping insertion in model container [2019-11-26 02:49:50,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:50" (3/3) ... [2019-11-26 02:49:50,409 INFO L109 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2019-11-26 02:49:50,418 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:49:50,424 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-26 02:49:50,433 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-26 02:49:50,454 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:49:50,454 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:49:50,454 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:49:50,454 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:49:50,454 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:49:50,455 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:49:50,455 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:49:50,455 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:49:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-26 02:49:50,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-26 02:49:50,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:50,473 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-26 02:49:50,473 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:49:50,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:50,479 INFO L82 PathProgramCache]: Analyzing trace with hash 959367, now seen corresponding path program 1 times [2019-11-26 02:49:50,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:49:50,487 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825602945] [2019-11-26 02:49:50,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:49:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:49:50,632 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 02:49:50,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825602945] [2019-11-26 02:49:50,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:49:50,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:49:50,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205942697] [2019-11-26 02:49:50,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:49:50,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:49:50,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:49:50,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:49:50,649 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2019-11-26 02:49:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:49:50,712 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-26 02:49:50,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:49:50,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-26 02:49:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:49:50,720 INFO L225 Difference]: With dead ends: 15 [2019-11-26 02:49:50,720 INFO L226 Difference]: Without dead ends: 8 [2019-11-26 02:49:50,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 02:49:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-26 02:49:50,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-11-26 02:49:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-26 02:49:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-11-26 02:49:50,746 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2019-11-26 02:49:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:49:50,747 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-26 02:49:50,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:49:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-11-26 02:49:50,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-26 02:49:50,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:49:50,747 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-26 02:49:50,748 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:49:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:49:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash 29740420, now seen corresponding path program 1 times [2019-11-26 02:49:50,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:49:50,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378556788] [2019-11-26 02:49:50,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:49:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:49:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:49:50,776 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:49:50,777 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:49:50,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:49:50 BoogieIcfgContainer [2019-11-26 02:49:50,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:49:50,794 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:49:50,794 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:49:50,794 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:49:50,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:49:50" (3/4) ... [2019-11-26 02:49:50,796 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:49:50,830 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_82ceb4e9-6ea8-4c1e-ae52-08789ef4827a/bin/utaipan/witness.graphml [2019-11-26 02:49:50,831 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:49:50,833 INFO L168 Benchmark]: Toolchain (without parser) took 996.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -118.2 MB). Peak memory consumption was 2.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:50,833 INFO L168 Benchmark]: CDTParser took 0.22 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 02:49:50,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -160.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:50,834 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:49:50,835 INFO L168 Benchmark]: Boogie Preprocessor took 22.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:49:50,835 INFO L168 Benchmark]: RCFGBuilder took 270.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:50,836 INFO L168 Benchmark]: TraceAbstraction took 389.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:49:50,836 INFO L168 Benchmark]: Witness Printer took 37.18 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:49:50,840 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 244.62 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 120.6 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -160.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.17 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 270.64 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 389.83 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.1 MB). Peak memory consumption was 27.1 MB. Max. memory is 11.5 GB. * Witness Printer took 37.18 ms. Allocated memory is still 1.1 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: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, oldx; [L24] x = __VERIFIER_nondet_int() [L25] oldx = __VERIFIER_nondet_int() [L26] x > 1 && -2*x == oldx [L26] -2*x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 2 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 5 SDtfs, 7 SDslu, 2 SDs, 0 SdLazy, 18 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 30 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...