./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/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 32bit --witnessprinter.graph.data.programhash 0449565d36be00deee168302da89fb227fc941e3 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 08:41:08,197 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 08:41:08,198 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 08:41:08,205 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 08:41:08,205 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 08:41:08,206 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 08:41:08,207 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 08:41:08,208 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 08:41:08,209 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 08:41:08,210 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 08:41:08,210 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 08:41:08,210 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 08:41:08,211 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 08:41:08,212 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 08:41:08,212 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 08:41:08,213 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 08:41:08,213 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 08:41:08,215 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 08:41:08,216 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 08:41:08,217 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 08:41:08,218 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 08:41:08,219 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 08:41:08,220 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 08:41:08,220 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 08:41:08,220 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 08:41:08,221 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 08:41:08,222 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 08:41:08,222 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 08:41:08,223 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 08:41:08,224 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 08:41:08,224 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 08:41:08,224 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 08:41:08,224 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 08:41:08,225 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 08:41:08,225 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 08:41:08,226 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 08:41:08,226 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-11-23 08:41:08,236 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 08:41:08,236 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 08:41:08,236 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 08:41:08,237 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 08:41:08,237 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 08:41:08,237 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 08:41:08,237 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 08:41:08,237 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 08:41:08,237 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 08:41:08,237 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 08:41:08,238 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 08:41:08,238 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 08:41:08,238 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 08:41:08,238 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 08:41:08,238 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 08:41:08,238 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-23 08:41:08,239 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 08:41:08,240 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 08:41:08,240 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 08:41:08,240 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 08:41:08,241 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 08:41:08,241 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 08:41:08,241 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 08:41:08,241 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 08:41:08,243 INFO L133 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_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0449565d36be00deee168302da89fb227fc941e3 [2018-11-23 08:41:08,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 08:41:08,274 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 08:41:08,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 08:41:08,277 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 08:41:08,277 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 08:41:08,277 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-23 08:41:08,314 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/data/f0018ff0c/bf839e41d200441d81b8430eda65fcba/FLAG8567d14b3 [2018-11-23 08:41:08,718 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 08:41:08,718 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/sv-benchmarks/c/recursive-simple/id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-23 08:41:08,722 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/data/f0018ff0c/bf839e41d200441d81b8430eda65fcba/FLAG8567d14b3 [2018-11-23 08:41:08,733 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/data/f0018ff0c/bf839e41d200441d81b8430eda65fcba [2018-11-23 08:41:08,735 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 08:41:08,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 08:41:08,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 08:41:08,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 08:41:08,740 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 08:41:08,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ef1641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08, skipping insertion in model container [2018-11-23 08:41:08,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 08:41:08,760 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 08:41:08,872 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 08:41:08,874 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 08:41:08,883 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 08:41:08,891 INFO L195 MainTranslator]: Completed translation [2018-11-23 08:41:08,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08 WrapperNode [2018-11-23 08:41:08,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 08:41:08,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 08:41:08,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 08:41:08,892 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 08:41:08,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 08:41:08,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 08:41:08,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 08:41:08,904 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 08:41:08,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... [2018-11-23 08:41:08,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 08:41:08,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 08:41:08,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 08:41:08,914 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 08:41:08,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/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 [2018-11-23 08:41:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-23 08:41:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-23 08:41:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 08:41:08,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 08:41:08,990 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-23 08:41:08,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-23 08:41:08,991 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-23 08:41:08,991 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-23 08:41:09,092 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 08:41:09,092 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-23 08:41:09,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:41:09 BoogieIcfgContainer [2018-11-23 08:41:09,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 08:41:09,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 08:41:09,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 08:41:09,095 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 08:41:09,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:41:08" (1/3) ... [2018-11-23 08:41:09,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5531ae46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:41:09, skipping insertion in model container [2018-11-23 08:41:09,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:41:08" (2/3) ... [2018-11-23 08:41:09,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5531ae46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:41:09, skipping insertion in model container [2018-11-23 08:41:09,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:41:09" (3/3) ... [2018-11-23 08:41:09,098 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b5_o10_true-unreach-call_true-termination_true-no-overflow.c [2018-11-23 08:41:09,106 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 08:41:09,112 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-23 08:41:09,124 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-23 08:41:09,150 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 08:41:09,150 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 08:41:09,150 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 08:41:09,150 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 08:41:09,150 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 08:41:09,150 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 08:41:09,150 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 08:41:09,151 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 08:41:09,163 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-23 08:41:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-23 08:41:09,167 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 08:41:09,167 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:41:09,169 INFO L423 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 08:41:09,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:41:09,172 INFO L82 PathProgramCache]: Analyzing trace with hash 755938958, now seen corresponding path program 1 times [2018-11-23 08:41:09,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 08:41:09,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:09,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:41:09,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:09,216 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 08:41:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:41:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 08:41:09,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 08:41:09,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 08:41:09,296 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 08:41:09,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 08:41:09,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 08:41:09,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 08:41:09,309 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2018-11-23 08:41:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:41:09,347 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-11-23 08:41:09,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 08:41:09,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-11-23 08:41:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 08:41:09,354 INFO L225 Difference]: With dead ends: 35 [2018-11-23 08:41:09,354 INFO L226 Difference]: Without dead ends: 22 [2018-11-23 08:41:09,357 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 08:41:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-23 08:41:09,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-23 08:41:09,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-23 08:41:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-23 08:41:09,387 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2018-11-23 08:41:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 08:41:09,387 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-23 08:41:09,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 08:41:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-23 08:41:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-23 08:41:09,388 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 08:41:09,388 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:41:09,388 INFO L423 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 08:41:09,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:41:09,389 INFO L82 PathProgramCache]: Analyzing trace with hash 323921339, now seen corresponding path program 1 times [2018-11-23 08:41:09,389 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 08:41:09,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:09,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:41:09,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:09,390 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 08:41:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:41:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 08:41:09,447 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 08:41:09,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 08:41:09,447 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 08:41:09,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 08:41:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 08:41:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 08:41:09,449 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-11-23 08:41:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:41:09,485 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-23 08:41:09,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-23 08:41:09,485 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-11-23 08:41:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 08:41:09,487 INFO L225 Difference]: With dead ends: 33 [2018-11-23 08:41:09,487 INFO L226 Difference]: Without dead ends: 25 [2018-11-23 08:41:09,488 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-23 08:41:09,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-23 08:41:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-23 08:41:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-23 08:41:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-23 08:41:09,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 24 [2018-11-23 08:41:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 08:41:09,492 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-23 08:41:09,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 08:41:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-23 08:41:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-23 08:41:09,492 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 08:41:09,493 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:41:09,493 INFO L423 AbstractCegarLoop]: === Iteration 3 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 08:41:09,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:41:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash 324844860, now seen corresponding path program 1 times [2018-11-23 08:41:09,495 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 08:41:09,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:09,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:41:09,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:09,496 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 08:41:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:41:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 08:41:09,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 08:41:09,549 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 08:41:09,550 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-11-23 08:41:09,551 INFO L202 CegarAbsIntRunner]: [0], [4], [16], [19], [20], [22], [23], [24], [26], [30], [31], [32], [33], [34], [36], [38], [39] [2018-11-23 08:41:09,573 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-23 08:41:09,573 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-23 08:41:09,741 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-23 08:41:09,742 INFO L272 AbstractInterpreter]: Visited 17 different actions 68 times. Merged at 6 different actions 24 times. Never widened. Performed 180 root evaluator evaluations with a maximum evaluation depth of 5. Performed 180 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-11-23 08:41:09,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:41:09,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-23 08:41:09,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 08:41:09,747 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 08:41:09,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:41:09,754 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-23 08:41:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:41:09,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 08:41:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 08:41:09,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 08:41:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 08:41:09,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-23 08:41:09,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-11-23 08:41:09,983 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-23 08:41:09,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-23 08:41:09,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-23 08:41:09,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-11-23 08:41:09,984 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-11-23 08:41:10,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:41:10,021 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-11-23 08:41:10,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-23 08:41:10,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-11-23 08:41:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 08:41:10,022 INFO L225 Difference]: With dead ends: 29 [2018-11-23 08:41:10,022 INFO L226 Difference]: Without dead ends: 28 [2018-11-23 08:41:10,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-11-23 08:41:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-23 08:41:10,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-11-23 08:41:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-23 08:41:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-23 08:41:10,025 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-11-23 08:41:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 08:41:10,026 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-23 08:41:10,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-23 08:41:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-23 08:41:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 08:41:10,026 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 08:41:10,027 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:41:10,027 INFO L423 AbstractCegarLoop]: === Iteration 4 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 08:41:10,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:41:10,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1480256124, now seen corresponding path program 1 times [2018-11-23 08:41:10,027 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 08:41:10,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:10,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:41:10,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:10,028 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 08:41:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:41:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-23 08:41:10,054 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 08:41:10,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-23 08:41:10,054 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 08:41:10,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-23 08:41:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-23 08:41:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-23 08:41:10,055 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 3 states. [2018-11-23 08:41:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:41:10,059 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-23 08:41:10,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-23 08:41:10,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-11-23 08:41:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 08:41:10,060 INFO L225 Difference]: With dead ends: 27 [2018-11-23 08:41:10,060 INFO L226 Difference]: Without dead ends: 26 [2018-11-23 08:41:10,061 INFO L631 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 [2018-11-23 08:41:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-23 08:41:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-23 08:41:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-23 08:41:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-23 08:41:10,064 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 25 [2018-11-23 08:41:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 08:41:10,064 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-23 08:41:10,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-23 08:41:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-11-23 08:41:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-23 08:41:10,065 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 08:41:10,065 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 08:41:10,065 INFO L423 AbstractCegarLoop]: === Iteration 5 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-23 08:41:10,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 08:41:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash 226188295, now seen corresponding path program 1 times [2018-11-23 08:41:10,066 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 08:41:10,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:10,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 08:41:10,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 08:41:10,067 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 08:41:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 08:41:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-23 08:41:10,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 08:41:10,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-23 08:41:10,087 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 08:41:10,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-23 08:41:10,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-23 08:41:10,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 08:41:10,088 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2018-11-23 08:41:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 08:41:10,100 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-11-23 08:41:10,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-23 08:41:10,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-11-23 08:41:10,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 08:41:10,100 INFO L225 Difference]: With dead ends: 26 [2018-11-23 08:41:10,100 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 08:41:10,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-23 08:41:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 08:41:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 08:41:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 08:41:10,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 08:41:10,101 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-11-23 08:41:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 08:41:10,101 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 08:41:10,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-23 08:41:10,101 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 08:41:10,102 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 08:41:10,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-23 08:41:10,115 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-23 08:41:10,115 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-23 08:41:10,115 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-23 08:41:10,115 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-23 08:41:10,115 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-23 08:41:10,115 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-23 08:41:10,115 INFO L448 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-23 08:41:10,116 INFO L448 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-23 08:41:10,116 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-11-23 08:41:10,116 INFO L451 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2018-11-23 08:41:10,116 INFO L448 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-23 08:41:10,116 INFO L448 ceAbstractionStarter]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2018-11-23 08:41:10,116 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-11-23 08:41:10,116 INFO L448 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2018-11-23 08:41:10,116 INFO L448 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-23 08:41:10,116 INFO L451 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2018-11-23 08:41:10,116 INFO L448 ceAbstractionStarter]: For program point idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 6) no Hoare annotation was computed. [2018-11-23 08:41:10,117 INFO L448 ceAbstractionStarter]: For program point idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 6) no Hoare annotation was computed. [2018-11-23 08:41:10,117 INFO L448 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-11-23 08:41:10,117 INFO L451 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2018-11-23 08:41:10,117 INFO L448 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-23 08:41:10,117 INFO L448 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-23 08:41:10,117 INFO L448 ceAbstractionStarter]: For program point L6-2(line 6) no Hoare annotation was computed. [2018-11-23 08:41:10,117 INFO L448 ceAbstractionStarter]: For program point L6-3(line 6) no Hoare annotation was computed. [2018-11-23 08:41:10,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 08:41:10 BoogieIcfgContainer [2018-11-23 08:41:10,119 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 08:41:10,119 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 08:41:10,119 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 08:41:10,120 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 08:41:10,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:41:09" (3/4) ... [2018-11-23 08:41:10,122 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 08:41:10,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-23 08:41:10,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-23 08:41:10,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-23 08:41:10,129 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-23 08:41:10,129 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-23 08:41:10,129 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 08:41:10,152 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a35830bf-dd87-4f1e-bfb4-a8f9d724ab47/bin-2019/utaipan/witness.graphml [2018-11-23 08:41:10,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 08:41:10,153 INFO L168 Benchmark]: Toolchain (without parser) took 1417.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 959.2 MB in the beginning and 1.0 GB in the end (delta: -51.4 MB). Peak memory consumption was 89.1 MB. Max. memory is 11.5 GB. [2018-11-23 08:41:10,154 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:41:10,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 154.68 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:41:10,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 08:41:10,155 INFO L168 Benchmark]: Boogie Preprocessor took 10.17 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:41:10,155 INFO L168 Benchmark]: RCFGBuilder took 179.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-23 08:41:10,155 INFO L168 Benchmark]: TraceAbstraction took 1025.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 113.1 MB). Peak memory consumption was 113.1 MB. Max. memory is 11.5 GB. [2018-11-23 08:41:10,156 INFO L168 Benchmark]: Witness Printer took 32.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 08:41:10,157 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 154.68 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 11.62 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.17 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 179.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.5 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -180.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1025.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 113.1 MB). Peak memory consumption was 113.1 MB. Max. memory is 11.5 GB. * Witness Printer took 32.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 6]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 2 error locations. SAFE Result, 0.9s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 10 SDslu, 188 SDs, 0 SdLazy, 82 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 6245 SizeOfPredicates, 1 NumberOfNonLiveVariables, 56 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 80/92 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...