./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/recursive-simple/id_b3_o2_false-unreach-call_true-termination_true-no-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_b3_o2_false-unreach-call_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/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 3bf945356a28265a842df89cdbf40bfa9a223140 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:06:18,616 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:06:18,617 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:06:18,623 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:06:18,623 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:06:18,624 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:06:18,625 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:06:18,626 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:06:18,627 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:06:18,628 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:06:18,628 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:06:18,628 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:06:18,629 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:06:18,629 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:06:18,630 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:06:18,630 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:06:18,631 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:06:18,632 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:06:18,633 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:06:18,634 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:06:18,635 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:06:18,635 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:06:18,636 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:06:18,636 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:06:18,636 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:06:18,637 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:06:18,638 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:06:18,638 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:06:18,638 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:06:18,639 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:06:18,639 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:06:18,640 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:06:18,640 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:06:18,640 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:06:18,641 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:06:18,641 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:06:18,642 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2018-11-18 10:06:18,650 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:06:18,650 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:06:18,650 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 10:06:18,650 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 10:06:18,651 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 10:06:18,651 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 10:06:18,652 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:06:18,652 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 10:06:18,652 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 10:06:18,652 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:06:18,652 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:06:18,653 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:06:18,654 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 10:06:18,654 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:06:18,654 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:06:18,654 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 10:06:18,654 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 10:06:18,654 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 10:06:18,654 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:06:18,654 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 10:06:18,655 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 10:06:18,655 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 10:06:18,655 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 10:06:18,655 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 10:06:18,655 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 10:06:18,655 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_6828be22-1dce-4ef0-a883-f29fdb9eccc0/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 -> 3bf945356a28265a842df89cdbf40bfa9a223140 [2018-11-18 10:06:18,680 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:06:18,689 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:06:18,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:06:18,693 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:06:18,693 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:06:18,693 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/../../sv-benchmarks/c/recursive-simple/id_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:06:18,735 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/data/57ba2f52e/b2ce965770464df998ab526be528bdfc/FLAG87647f0b3 [2018-11-18 10:06:19,148 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:06:19,148 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/sv-benchmarks/c/recursive-simple/id_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:06:19,152 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/data/57ba2f52e/b2ce965770464df998ab526be528bdfc/FLAG87647f0b3 [2018-11-18 10:06:19,161 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/data/57ba2f52e/b2ce965770464df998ab526be528bdfc [2018-11-18 10:06:19,164 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:06:19,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:06:19,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:06:19,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:06:19,170 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:06:19,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad25d4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19, skipping insertion in model container [2018-11-18 10:06:19,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:06:19,196 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:06:19,309 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:06:19,311 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:06:19,320 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:06:19,327 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:06:19,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19 WrapperNode [2018-11-18 10:06:19,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:06:19,328 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:06:19,328 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:06:19,328 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:06:19,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:06:19,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:06:19,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:06:19,343 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:06:19,349 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,353 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... [2018-11-18 10:06:19,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:06:19,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:06:19,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:06:19,355 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:06:19,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/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 10:06:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 10:06:19,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 10:06:19,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:06:19,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:06:19,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 10:06:19,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 10:06:19,429 INFO L130 BoogieDeclarations]: Found specification of procedure id [2018-11-18 10:06:19,429 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2018-11-18 10:06:19,528 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:06:19,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:06:19 BoogieIcfgContainer [2018-11-18 10:06:19,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:06:19,529 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 10:06:19,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 10:06:19,531 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 10:06:19,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 10:06:19" (1/3) ... [2018-11-18 10:06:19,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1096739f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:06:19, skipping insertion in model container [2018-11-18 10:06:19,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:06:19" (2/3) ... [2018-11-18 10:06:19,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1096739f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 10:06:19, skipping insertion in model container [2018-11-18 10:06:19,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:06:19" (3/3) ... [2018-11-18 10:06:19,533 INFO L112 eAbstractionObserver]: Analyzing ICFG id_b3_o2_false-unreach-call_true-termination_true-no-overflow.c [2018-11-18 10:06:19,539 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 10:06:19,543 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-18 10:06:19,552 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-18 10:06:19,574 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 10:06:19,574 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 10:06:19,575 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 10:06:19,575 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:06:19,575 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:06:19,575 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 10:06:19,575 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:06:19,575 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 10:06:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-11-18 10:06:19,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-11-18 10:06:19,594 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:19,594 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:19,596 INFO L423 AbstractCegarLoop]: === Iteration 1 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 10:06:19,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:19,599 INFO L82 PathProgramCache]: Analyzing trace with hash 755938958, now seen corresponding path program 1 times [2018-11-18 10:06:19,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:19,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:19,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:19,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:19,635 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:06:19,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:06:19,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 10:06:19,727 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:19,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 10:06:19,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 10:06:19,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 10:06:19,740 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2018-11-18 10:06:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:19,780 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-11-18 10:06:19,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 10:06:19,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-11-18 10:06:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:19,787 INFO L225 Difference]: With dead ends: 35 [2018-11-18 10:06:19,787 INFO L226 Difference]: Without dead ends: 22 [2018-11-18 10:06:19,789 INFO L604 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 [2018-11-18 10:06:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-18 10:06:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-18 10:06:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 10:06:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-11-18 10:06:19,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2018-11-18 10:06:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:19,817 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-11-18 10:06:19,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 10:06:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-11-18 10:06:19,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 10:06:19,818 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:19,818 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:19,818 INFO L423 AbstractCegarLoop]: === Iteration 2 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 10:06:19,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:19,818 INFO L82 PathProgramCache]: Analyzing trace with hash 323921339, now seen corresponding path program 1 times [2018-11-18 10:06:19,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:19,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:19,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:19,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:19,820 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:06:19,869 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:06:19,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 10:06:19,870 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:19,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 10:06:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 10:06:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 10:06:19,871 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-11-18 10:06:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:19,903 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-18 10:06:19,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 10:06:19,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2018-11-18 10:06:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:19,905 INFO L225 Difference]: With dead ends: 33 [2018-11-18 10:06:19,905 INFO L226 Difference]: Without dead ends: 25 [2018-11-18 10:06:19,906 INFO L604 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 [2018-11-18 10:06:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-11-18 10:06:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2018-11-18 10:06:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 10:06:19,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-11-18 10:06:19,910 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 24 [2018-11-18 10:06:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:19,911 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-11-18 10:06:19,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 10:06:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-11-18 10:06:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-11-18 10:06:19,911 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:19,912 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:19,912 INFO L423 AbstractCegarLoop]: === Iteration 3 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 10:06:19,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash 324844860, now seen corresponding path program 1 times [2018-11-18 10:06:19,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:19,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:19,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:19,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:19,915 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:06:19,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:19,988 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 10:06:19,988 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-11-18 10:06:19,990 INFO L202 CegarAbsIntRunner]: [0], [4], [16], [19], [20], [22], [23], [24], [26], [30], [31], [32], [33], [34], [36], [38], [39] [2018-11-18 10:06:20,013 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 10:06:20,013 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 10:06:20,160 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 10:06:20,161 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. [2018-11-18 10:06:20,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:20,170 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 10:06:20,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:06:20,170 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/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 10:06:20,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:20,176 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 10:06:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:20,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:06:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:06:20,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 10:06:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-18 10:06:20,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 10:06:20,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2018-11-18 10:06:20,387 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 10:06:20,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 10:06:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 10:06:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-11-18 10:06:20,388 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 9 states. [2018-11-18 10:06:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:20,426 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-11-18 10:06:20,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 10:06:20,427 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-11-18 10:06:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:20,427 INFO L225 Difference]: With dead ends: 29 [2018-11-18 10:06:20,427 INFO L226 Difference]: Without dead ends: 28 [2018-11-18 10:06:20,428 INFO L604 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 [2018-11-18 10:06:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-18 10:06:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2018-11-18 10:06:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-18 10:06:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-11-18 10:06:20,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-11-18 10:06:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:20,432 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-11-18 10:06:20,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 10:06:20,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-11-18 10:06:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 10:06:20,433 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:20,433 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:20,433 INFO L423 AbstractCegarLoop]: === Iteration 4 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 10:06:20,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:20,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1480256124, now seen corresponding path program 1 times [2018-11-18 10:06:20,433 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:20,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:20,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:20,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:20,434 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 10:06:20,453 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:06:20,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 10:06:20,453 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:20,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 10:06:20,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 10:06:20,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 10:06:20,454 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 3 states. [2018-11-18 10:06:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:20,460 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-18 10:06:20,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 10:06:20,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2018-11-18 10:06:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:20,461 INFO L225 Difference]: With dead ends: 27 [2018-11-18 10:06:20,462 INFO L226 Difference]: Without dead ends: 26 [2018-11-18 10:06:20,462 INFO L604 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 [2018-11-18 10:06:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-18 10:06:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-18 10:06:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 10:06:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-18 10:06:20,466 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 25 [2018-11-18 10:06:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:20,466 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-18 10:06:20,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 10:06:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-11-18 10:06:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-18 10:06:20,467 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 10:06:20,467 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:06:20,467 INFO L423 AbstractCegarLoop]: === Iteration 5 === [idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 10:06:20,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:06:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash 226188295, now seen corresponding path program 1 times [2018-11-18 10:06:20,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 10:06:20,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:20,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:06:20,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:06:20,469 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 10:06:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:06:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 10:06:20,498 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:06:20,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 10:06:20,498 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 10:06:20,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 10:06:20,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 10:06:20,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-18 10:06:20,499 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 4 states. [2018-11-18 10:06:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:06:20,514 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-11-18 10:06:20,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 10:06:20,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2018-11-18 10:06:20,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 10:06:20,514 INFO L225 Difference]: With dead ends: 26 [2018-11-18 10:06:20,514 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 10:06:20,515 INFO L604 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 [2018-11-18 10:06:20,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 10:06:20,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 10:06:20,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 10:06:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 10:06:20,515 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2018-11-18 10:06:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 10:06:20,516 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:06:20,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 10:06:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:06:20,516 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 10:06:20,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-18 10:06:20,527 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-18 10:06:20,527 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point L14(lines 14 16) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2018-11-18 10:06:20,527 INFO L428 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: true [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2018-11-18 10:06:20,527 INFO L425 ceAbstractionStarter]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point idErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 6) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point idErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 6) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L428 ceAbstractionStarter]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point L7(line 7) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L428 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: true [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point L6-2(line 6) no Hoare annotation was computed. [2018-11-18 10:06:20,528 INFO L425 ceAbstractionStarter]: For program point L6-3(line 6) no Hoare annotation was computed. [2018-11-18 10:06:20,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 10:06:20 BoogieIcfgContainer [2018-11-18 10:06:20,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 10:06:20,530 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:06:20,530 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:06:20,530 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:06:20,530 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:06:19" (3/4) ... [2018-11-18 10:06:20,532 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 10:06:20,536 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 10:06:20,536 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 10:06:20,536 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2018-11-18 10:06:20,538 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2018-11-18 10:06:20,538 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-11-18 10:06:20,539 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 10:06:20,562 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_6828be22-1dce-4ef0-a883-f29fdb9eccc0/bin-2019/utaipan/witness.graphml [2018-11-18 10:06:20,562 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:06:20,562 INFO L168 Benchmark]: Toolchain (without parser) took 1397.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 961.9 MB in the beginning and 1.0 GB in the end (delta: -39.8 MB). Peak memory consumption was 94.5 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:20,563 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:06:20,563 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.71 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:20,564 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.42 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:06:20,564 INFO L168 Benchmark]: Boogie Preprocessor took 11.34 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:20,564 INFO L168 Benchmark]: RCFGBuilder took 174.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:20,565 INFO L168 Benchmark]: TraceAbstraction took 1000.67 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: 113.0 MB). Peak memory consumption was 113.0 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:20,565 INFO L168 Benchmark]: Witness Printer took 32.09 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-18 10:06:20,567 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 161.71 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 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 14.42 ms. Allocated memory is still 1.0 GB. Free memory is still 951.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.34 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 945.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 174.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -174.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1000.67 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: 113.0 MB). Peak memory consumption was 113.0 MB. Max. memory is 11.5 GB. * Witness Printer took 32.09 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: 5.4 MB). Peak memory consumption was 5.4 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...