./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 58c483ef37358c272383ba8c3b69f22948f7d8e5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 15:58:46,201 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 15:58:46,203 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 15:58:46,213 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 15:58:46,214 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 15:58:46,214 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 15:58:46,215 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 15:58:46,217 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 15:58:46,218 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 15:58:46,221 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 15:58:46,223 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 15:58:46,223 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 15:58:46,224 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 15:58:46,232 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 15:58:46,233 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 15:58:46,233 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 15:58:46,234 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 15:58:46,235 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 15:58:46,238 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 15:58:46,239 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 15:58:46,240 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 15:58:46,241 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 15:58:46,242 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 15:58:46,242 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 15:58:46,245 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 15:58:46,245 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 15:58:46,246 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 15:58:46,247 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 15:58:46,247 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 15:58:46,248 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 15:58:46,248 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 15:58:46,248 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 15:58:46,248 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 15:58:46,249 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 15:58:46,249 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 15:58:46,250 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 15:58:46,250 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 15:58:46,266 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 15:58:46,269 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 15:58:46,270 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 15:58:46,270 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 15:58:46,270 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 15:58:46,270 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 15:58:46,270 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 15:58:46,271 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 15:58:46,271 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 15:58:46,271 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 15:58:46,272 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 15:58:46,272 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 15:58:46,272 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 15:58:46,273 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 15:58:46,273 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 15:58:46,273 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 15:58:46,273 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 15:58:46,273 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 15:58:46,274 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 15:58:46,274 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 15:58:46,274 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 15:58:46,274 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 15:58:46,274 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 15:58:46,274 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 15:58:46,274 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 15:58:46,274 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 15:58:46,275 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 15:58:46,275 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 15:58:46,275 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 15:58:46,275 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 15:58:46,275 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 15:58:46,275 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 15:58:46,275 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 15:58:46,275 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 15:58:46,276 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 15:58:46,276 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 15:58:46,276 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 15:58:46,276 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_6344cd92-a670-4e10-bd4f-9000dbef4027/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 ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58c483ef37358c272383ba8c3b69f22948f7d8e5 [2018-11-18 15:58:46,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 15:58:46,330 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 15:58:46,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 15:58:46,334 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 15:58:46,334 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 15:58:46,335 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/../../sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c [2018-11-18 15:58:46,379 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/data/8415e8f9d/5e1fd50740e4444788260e459b1b091a/FLAG38760df24 [2018-11-18 15:58:46,756 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 15:58:46,756 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/sv-benchmarks/c/loops-crafted-1/nested5_true-unreach-call.c [2018-11-18 15:58:46,762 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/data/8415e8f9d/5e1fd50740e4444788260e459b1b091a/FLAG38760df24 [2018-11-18 15:58:46,775 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/data/8415e8f9d/5e1fd50740e4444788260e459b1b091a [2018-11-18 15:58:46,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 15:58:46,779 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 15:58:46,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 15:58:46,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 15:58:46,783 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 15:58:46,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:58:46" (1/1) ... [2018-11-18 15:58:46,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6654e84b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:46, skipping insertion in model container [2018-11-18 15:58:46,787 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 03:58:46" (1/1) ... [2018-11-18 15:58:46,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 15:58:46,813 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 15:58:46,971 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:58:46,974 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 15:58:46,990 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 15:58:47,003 INFO L195 MainTranslator]: Completed translation [2018-11-18 15:58:47,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47 WrapperNode [2018-11-18 15:58:47,004 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 15:58:47,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 15:58:47,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 15:58:47,005 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 15:58:47,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 15:58:47,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 15:58:47,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 15:58:47,023 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 15:58:47,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... [2018-11-18 15:58:47,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 15:58:47,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 15:58:47,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 15:58:47,040 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 15:58:47,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/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 [2018-11-18 15:58:47,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 15:58:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 15:58:47,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 15:58:47,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 15:58:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 15:58:47,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 15:58:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 15:58:47,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 15:58:47,364 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 15:58:47,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:58:47 BoogieIcfgContainer [2018-11-18 15:58:47,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 15:58:47,365 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 15:58:47,365 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 15:58:47,368 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 15:58:47,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 03:58:46" (1/3) ... [2018-11-18 15:58:47,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcad27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:58:47, skipping insertion in model container [2018-11-18 15:58:47,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 03:58:47" (2/3) ... [2018-11-18 15:58:47,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bcad27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 03:58:47, skipping insertion in model container [2018-11-18 15:58:47,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:58:47" (3/3) ... [2018-11-18 15:58:47,372 INFO L112 eAbstractionObserver]: Analyzing ICFG nested5_true-unreach-call.c [2018-11-18 15:58:47,381 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 15:58:47,388 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 15:58:47,402 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 15:58:47,430 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 15:58:47,430 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 15:58:47,430 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 15:58:47,430 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 15:58:47,431 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 15:58:47,431 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 15:58:47,431 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 15:58:47,431 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 15:58:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-11-18 15:58:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 15:58:47,456 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:58:47,457 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:58:47,459 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:58:47,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:58:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash -909603619, now seen corresponding path program 1 times [2018-11-18 15:58:47,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:58:47,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:47,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:58:47,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:47,509 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:58:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:58:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:58:47,568 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:58:47,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 15:58:47,568 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:58:47,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 15:58:47,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 15:58:47,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:58:47,581 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2018-11-18 15:58:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:58:47,600 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2018-11-18 15:58:47,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 15:58:47,601 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-11-18 15:58:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:58:47,608 INFO L225 Difference]: With dead ends: 57 [2018-11-18 15:58:47,609 INFO L226 Difference]: Without dead ends: 27 [2018-11-18 15:58:47,612 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 15:58:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-18 15:58:47,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-18 15:58:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 15:58:47,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-11-18 15:58:47,643 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2018-11-18 15:58:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:58:47,644 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-11-18 15:58:47,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 15:58:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-11-18 15:58:47,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 15:58:47,645 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:58:47,645 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:58:47,645 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:58:47,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:58:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1571052641, now seen corresponding path program 1 times [2018-11-18 15:58:47,645 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:58:47,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:47,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:58:47,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:47,646 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:58:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:58:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:58:47,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 15:58:47,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 15:58:47,772 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:58:47,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 15:58:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 15:58:47,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:58:47,774 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2018-11-18 15:58:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:58:47,809 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2018-11-18 15:58:47,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 15:58:47,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2018-11-18 15:58:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:58:47,810 INFO L225 Difference]: With dead ends: 63 [2018-11-18 15:58:47,810 INFO L226 Difference]: Without dead ends: 41 [2018-11-18 15:58:47,811 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 15:58:47,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-11-18 15:58:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2018-11-18 15:58:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-18 15:58:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2018-11-18 15:58:47,815 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2018-11-18 15:58:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:58:47,815 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2018-11-18 15:58:47,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 15:58:47,815 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2018-11-18 15:58:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-18 15:58:47,816 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:58:47,816 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:58:47,816 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:58:47,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:58:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash -90353287, now seen corresponding path program 1 times [2018-11-18 15:58:47,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:58:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:47,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:58:47,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:47,818 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:58:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:58:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:58:47,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:58:47,924 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:58:47,925 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2018-11-18 15:58:47,926 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [13], [17], [22], [26], [31], [35], [40], [44], [47], [49], [51], [74], [77], [79], [85], [86], [87], [89] [2018-11-18 15:58:47,961 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 15:58:47,962 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 15:58:48,114 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 15:58:48,116 INFO L272 AbstractInterpreter]: Visited 21 different actions 29 times. Merged at 3 different actions 6 times. Never widened. Performed 53 root evaluator evaluations with a maximum evaluation depth of 12. Performed 53 inverse root evaluator evaluations with a maximum inverse evaluation depth of 12. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2018-11-18 15:58:48,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:58:48,123 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 15:58:48,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:58:48,124 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/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 [2018-11-18 15:58:48,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:58:48,156 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 15:58:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:58:48,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:58:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:58:48,280 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:58:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:58:48,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 15:58:48,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-11-18 15:58:48,530 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 15:58:48,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 15:58:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 15:58:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-18 15:58:48,532 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2018-11-18 15:58:48,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:58:48,565 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2018-11-18 15:58:48,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 15:58:48,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-18 15:58:48,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:58:48,566 INFO L225 Difference]: With dead ends: 68 [2018-11-18 15:58:48,566 INFO L226 Difference]: Without dead ends: 44 [2018-11-18 15:58:48,568 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2018-11-18 15:58:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-18 15:58:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2018-11-18 15:58:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-18 15:58:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-11-18 15:58:48,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2018-11-18 15:58:48,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:58:48,575 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-11-18 15:58:48,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 15:58:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-11-18 15:58:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 15:58:48,575 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 15:58:48,576 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 15:58:48,577 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 15:58:48,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 15:58:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash 168764769, now seen corresponding path program 2 times [2018-11-18 15:58:48,577 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 15:58:48,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:48,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 15:58:48,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 15:58:48,582 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 15:58:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 15:58:48,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 15:58:48,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:58:48,723 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 15:58:48,723 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 15:58:48,723 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 15:58:48,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 15:58:48,723 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 15:58:48,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 15:58:48,738 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 15:58:49,036 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 15:58:49,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 15:58:49,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 15:58:53,616 WARN L180 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 19 [2018-11-18 15:58:53,937 WARN L180 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-11-18 15:58:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:58:53,949 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 15:58:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 15:58:56,441 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 15:58:56,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 15 [2018-11-18 15:58:56,441 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 15:58:56,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 15:58:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 15:58:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=156, Unknown=3, NotChecked=0, Total=210 [2018-11-18 15:58:56,443 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2018-11-18 15:59:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 15:59:01,289 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2018-11-18 15:59:01,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 15:59:01,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2018-11-18 15:59:01,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 15:59:01,291 INFO L225 Difference]: With dead ends: 43 [2018-11-18 15:59:01,291 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 15:59:01,292 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=64, Invalid=205, Unknown=3, NotChecked=0, Total=272 [2018-11-18 15:59:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 15:59:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 15:59:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 15:59:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 15:59:01,293 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-11-18 15:59:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 15:59:01,293 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 15:59:01,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 15:59:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 15:59:01,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 15:59:01,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 15:59:02,129 WARN L180 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-11-18 15:59:02,361 WARN L180 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-11-18 15:59:02,363 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 15:59:02,363 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:59:02,363 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 15:59:02,363 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 15:59:02,364 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 15:59:02,364 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 15:59:02,364 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2018-11-18 15:59:02,364 INFO L425 ceAbstractionStarter]: For program point L19-1(lines 19 22) no Hoare annotation was computed. [2018-11-18 15:59:02,364 INFO L421 ceAbstractionStarter]: At program point L19-3(lines 19 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-11-18 15:59:02,364 INFO L425 ceAbstractionStarter]: For program point L20-1(line 20) no Hoare annotation was computed. [2018-11-18 15:59:02,364 INFO L425 ceAbstractionStarter]: For program point L20-3(line 20) no Hoare annotation was computed. [2018-11-18 15:59:02,364 INFO L421 ceAbstractionStarter]: At program point L20-4(line 20) the Hoare annotation is: (or (and (<= main_~v~0 0) (< 0 (+ (div main_~v~0 4294967296) 1))) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-11-18 15:59:02,364 INFO L425 ceAbstractionStarter]: For program point L16-1(lines 16 22) no Hoare annotation was computed. [2018-11-18 15:59:02,365 INFO L421 ceAbstractionStarter]: At program point L20-5(line 20) the Hoare annotation is: (and (<= 10 (mod main_~v~0 4294967296)) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-11-18 15:59:02,365 INFO L425 ceAbstractionStarter]: For program point L16-3(lines 16 22) no Hoare annotation was computed. [2018-11-18 15:59:02,365 INFO L421 ceAbstractionStarter]: At program point L16-4(lines 16 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-11-18 15:59:02,365 INFO L425 ceAbstractionStarter]: For program point L16-5(lines 10 23) no Hoare annotation was computed. [2018-11-18 15:59:02,365 INFO L425 ceAbstractionStarter]: For program point L21(lines 19 22) no Hoare annotation was computed. [2018-11-18 15:59:02,365 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 22) no Hoare annotation was computed. [2018-11-18 15:59:02,365 INFO L425 ceAbstractionStarter]: For program point L17-3(lines 17 22) no Hoare annotation was computed. [2018-11-18 15:59:02,365 INFO L421 ceAbstractionStarter]: At program point L17-4(lines 17 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-11-18 15:59:02,365 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2018-11-18 15:59:02,365 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 22) no Hoare annotation was computed. [2018-11-18 15:59:02,366 INFO L425 ceAbstractionStarter]: For program point L18-3(lines 18 22) no Hoare annotation was computed. [2018-11-18 15:59:02,366 INFO L421 ceAbstractionStarter]: At program point L18-4(lines 18 22) the Hoare annotation is: (or (< (mod main_~v~0 4294967296) 10) (< (mod (+ main_~v~0 4294967295) 4294967296) 10)) [2018-11-18 15:59:02,366 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-18 15:59:02,366 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-18 15:59:02,366 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-18 15:59:02,366 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 15:59:02,369 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-18 15:59:02,369 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-18 15:59:02,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 03:59:02 BoogieIcfgContainer [2018-11-18 15:59:02,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 15:59:02,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 15:59:02,384 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 15:59:02,385 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 15:59:02,385 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 03:58:47" (3/4) ... [2018-11-18 15:59:02,388 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 15:59:02,394 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 15:59:02,394 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 15:59:02,394 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-18 15:59:02,398 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-11-18 15:59:02,398 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 15:59:02,399 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 15:59:02,434 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6344cd92-a670-4e10-bd4f-9000dbef4027/bin-2019/utaipan/witness.graphml [2018-11-18 15:59:02,434 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 15:59:02,435 INFO L168 Benchmark]: Toolchain (without parser) took 15657.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 954.4 MB in the beginning and 1.0 GB in the end (delta: -59.0 MB). Peak memory consumption was 119.8 MB. Max. memory is 11.5 GB. [2018-11-18 15:59:02,436 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:59:02,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.59 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 942.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2018-11-18 15:59:02,437 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.24 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 15:59:02,437 INFO L168 Benchmark]: Boogie Preprocessor took 16.94 ms. Allocated memory is still 1.0 GB. Free memory is still 939.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 15:59:02,437 INFO L168 Benchmark]: RCFGBuilder took 324.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 939.6 MB in the beginning and 1.2 GB in the end (delta: -220.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. [2018-11-18 15:59:02,438 INFO L168 Benchmark]: TraceAbstraction took 15018.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 143.2 MB). Peak memory consumption was 143.2 MB. Max. memory is 11.5 GB. [2018-11-18 15:59:02,438 INFO L168 Benchmark]: Witness Printer took 50.42 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-18 15:59:02,442 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 979.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 224.59 ms. Allocated memory is still 1.0 GB. Free memory was 954.4 MB in the beginning and 942.3 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.24 ms. Allocated memory is still 1.0 GB. Free memory was 942.3 MB in the beginning and 939.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.94 ms. Allocated memory is still 1.0 GB. Free memory is still 939.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 324.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 939.6 MB in the beginning and 1.2 GB in the end (delta: -220.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15018.18 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 143.2 MB). Peak memory consumption was 143.2 MB. Max. memory is 11.5 GB. * Witness Printer took 50.42 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (v <= 0 && 0 < v / 4294967296 + 1) || (v + 4294967295) % 4294967296 < 10 - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: v % 4294967296 < 10 || (v + 4294967295) % 4294967296 < 10 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. SAFE Result, 14.9s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 4.9s AutomataDifference, 0.0s DeadEndRemovalTime, 1.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 132 SDtfs, 79 SDslu, 192 SDs, 0 SdLazy, 67 SolverSat, 8 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 4 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 14 PreInvPairs, 26 NumberOfFragments, 89 HoareAnnotationTreeSize, 14 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 32 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 8.0s InterpolantComputationTime, 131 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 170 ConstructedInterpolants, 2 QuantifiedInterpolants, 10510 SizeOfPredicates, 4 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 14/27 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...