./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/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 aeade23d65797ff650f62ff8e383f015764d9ed2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-08 20:42:12,638 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-08 20:42:12,639 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-08 20:42:12,645 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-08 20:42:12,645 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-08 20:42:12,646 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-08 20:42:12,646 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-08 20:42:12,647 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-08 20:42:12,648 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-08 20:42:12,648 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-08 20:42:12,649 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-08 20:42:12,649 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-08 20:42:12,649 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-08 20:42:12,650 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-08 20:42:12,650 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-08 20:42:12,651 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-08 20:42:12,651 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-08 20:42:12,652 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-08 20:42:12,653 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-08 20:42:12,654 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-08 20:42:12,654 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-08 20:42:12,655 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-08 20:42:12,656 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-08 20:42:12,656 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-08 20:42:12,656 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-08 20:42:12,657 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-08 20:42:12,657 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-08 20:42:12,658 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-08 20:42:12,658 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-08 20:42:12,659 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-08 20:42:12,659 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-08 20:42:12,659 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-08 20:42:12,659 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-08 20:42:12,659 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-08 20:42:12,660 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-08 20:42:12,660 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-08 20:42:12,661 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-08 20:42:12,668 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-08 20:42:12,668 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-08 20:42:12,668 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-08 20:42:12,669 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-08 20:42:12,669 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-08 20:42:12,670 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-08 20:42:12,670 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-08 20:42:12,671 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-08 20:42:12,671 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-08 20:42:12,671 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-08 20:42:12,672 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-08 20:42:12,672 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-08 20:42:12,672 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_d1c3687d-144c-49d5-a2ba-0bec430984c6/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 -> aeade23d65797ff650f62ff8e383f015764d9ed2 [2018-12-08 20:42:12,689 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-08 20:42:12,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-08 20:42:12,700 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-08 20:42:12,701 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-08 20:42:12,701 INFO L276 PluginConnector]: CDTParser initialized [2018-12-08 20:42:12,702 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/../../sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i [2018-12-08 20:42:12,738 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/data/4b6af1704/7708490f30b14d358c4aaf059345553a/FLAG3c21e50d3 [2018-12-08 20:42:13,114 INFO L307 CDTParser]: Found 1 translation units. [2018-12-08 20:42:13,114 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/sv-benchmarks/c/loops/sum04_false-unreach-call_true-termination.i [2018-12-08 20:42:13,117 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/data/4b6af1704/7708490f30b14d358c4aaf059345553a/FLAG3c21e50d3 [2018-12-08 20:42:13,125 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/data/4b6af1704/7708490f30b14d358c4aaf059345553a [2018-12-08 20:42:13,127 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-08 20:42:13,127 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-08 20:42:13,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-08 20:42:13,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-08 20:42:13,130 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-08 20:42:13,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd2551a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13, skipping insertion in model container [2018-12-08 20:42:13,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-08 20:42:13,146 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-08 20:42:13,233 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:42:13,235 INFO L191 MainTranslator]: Completed pre-run [2018-12-08 20:42:13,243 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-08 20:42:13,251 INFO L195 MainTranslator]: Completed translation [2018-12-08 20:42:13,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13 WrapperNode [2018-12-08 20:42:13,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-08 20:42:13,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-08 20:42:13,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-08 20:42:13,252 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-08 20:42:13,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,267 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-08 20:42:13,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-08 20:42:13,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-08 20:42:13,268 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-08 20:42:13,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,281 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... [2018-12-08 20:42:13,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-08 20:42:13,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-08 20:42:13,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-08 20:42:13,283 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-08 20:42:13,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/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 [2018-12-08 20:42:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-08 20:42:13,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-08 20:42:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-08 20:42:13,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-08 20:42:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-08 20:42:13,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-08 20:42:13,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-12-08 20:42:13,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-12-08 20:42:13,424 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-08 20:42:13,424 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-08 20:42:13,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:42:13 BoogieIcfgContainer [2018-12-08 20:42:13,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-08 20:42:13,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-08 20:42:13,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-08 20:42:13,427 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-08 20:42:13,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.12 08:42:13" (1/3) ... [2018-12-08 20:42:13,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6972fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:42:13, skipping insertion in model container [2018-12-08 20:42:13,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.12 08:42:13" (2/3) ... [2018-12-08 20:42:13,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6972fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.12 08:42:13, skipping insertion in model container [2018-12-08 20:42:13,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:42:13" (3/3) ... [2018-12-08 20:42:13,429 INFO L112 eAbstractionObserver]: Analyzing ICFG sum04_false-unreach-call_true-termination.i [2018-12-08 20:42:13,435 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-08 20:42:13,439 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-08 20:42:13,452 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-08 20:42:13,476 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-08 20:42:13,476 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-08 20:42:13,476 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-08 20:42:13,476 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-08 20:42:13,476 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-08 20:42:13,476 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-08 20:42:13,476 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-08 20:42:13,476 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-08 20:42:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-08 20:42:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 20:42:13,490 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:42:13,491 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:42:13,492 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:42:13,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2018-12-08 20:42:13,497 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:42:13,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:42:13,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,526 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:42:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:13,559 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:42:13,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-08 20:42:13,559 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:42:13,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-12-08 20:42:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-12-08 20:42:13,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-12-08 20:42:13,571 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-12-08 20:42:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:42:13,583 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2018-12-08 20:42:13,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-08 20:42:13,584 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-12-08 20:42:13,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:42:13,588 INFO L225 Difference]: With dead ends: 30 [2018-12-08 20:42:13,589 INFO L226 Difference]: Without dead ends: 13 [2018-12-08 20:42:13,590 INFO L631 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 [2018-12-08 20:42:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-12-08 20:42:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-12-08 20:42:13,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-12-08 20:42:13,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-12-08 20:42:13,611 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-12-08 20:42:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:42:13,611 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-12-08 20:42:13,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-12-08 20:42:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-12-08 20:42:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-08 20:42:13,612 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:42:13,612 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:42:13,612 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:42:13,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:13,612 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2018-12-08 20:42:13,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:42:13,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:42:13,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,613 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:42:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:13,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-08 20:42:13,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-08 20:42:13,633 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:42:13,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-08 20:42:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-08 20:42:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:42:13,634 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2018-12-08 20:42:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:42:13,648 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2018-12-08 20:42:13,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-08 20:42:13,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-08 20:42:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:42:13,649 INFO L225 Difference]: With dead ends: 24 [2018-12-08 20:42:13,649 INFO L226 Difference]: Without dead ends: 16 [2018-12-08 20:42:13,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-08 20:42:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-12-08 20:42:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-12-08 20:42:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-08 20:42:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-12-08 20:42:13,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-12-08 20:42:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:42:13,653 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-12-08 20:42:13,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-08 20:42:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-12-08 20:42:13,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-08 20:42:13,653 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:42:13,653 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:42:13,653 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:42:13,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:13,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2018-12-08 20:42:13,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:42:13,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:42:13,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,654 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:42:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:13,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:13,682 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:42:13,683 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-08 20:42:13,684 INFO L205 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [19], [25], [28], [30], [36], [37], [38], [40] [2018-12-08 20:42:13,702 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:42:13,703 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:42:13,792 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:42:13,793 INFO L272 AbstractInterpreter]: Visited 13 different actions 29 times. Merged at 4 different actions 10 times. Never widened. Performed 74 root evaluator evaluations with a maximum evaluation depth of 5. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-12-08 20:42:13,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:13,799 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:42:13,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:13,799 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/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 [2018-12-08 20:42:13,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:42:13,806 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:42:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:13,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:42:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:13,837 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:42:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:13,872 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-08 20:42:13,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 8 [2018-12-08 20:42:13,872 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-08 20:42:13,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 20:42:13,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 20:42:13,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 20:42:13,873 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2018-12-08 20:42:13,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:42:13,893 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2018-12-08 20:42:13,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 20:42:13,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-12-08 20:42:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:42:13,894 INFO L225 Difference]: With dead ends: 24 [2018-12-08 20:42:13,894 INFO L226 Difference]: Without dead ends: 19 [2018-12-08 20:42:13,894 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-12-08 20:42:13,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-08 20:42:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-12-08 20:42:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-08 20:42:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-12-08 20:42:13,896 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-12-08 20:42:13,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:42:13,896 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-12-08 20:42:13,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 20:42:13,897 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-12-08 20:42:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-12-08 20:42:13,897 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:42:13,897 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:42:13,897 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:42:13,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:13,897 INFO L82 PathProgramCache]: Analyzing trace with hash 57842105, now seen corresponding path program 1 times [2018-12-08 20:42:13,897 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:42:13,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:42:13,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:13,898 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:42:13,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:13,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:13,913 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:42:13,913 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-12-08 20:42:13,913 INFO L205 CegarAbsIntRunner]: [0], [4], [10], [12], [15], [17], [19], [25], [28], [30], [36], [37], [38], [40] [2018-12-08 20:42:13,914 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-08 20:42:13,914 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-08 20:42:13,949 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-08 20:42:13,949 INFO L272 AbstractInterpreter]: Visited 14 different actions 38 times. Merged at 5 different actions 13 times. Never widened. Performed 102 root evaluator evaluations with a maximum evaluation depth of 5. Performed 102 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 5 fixpoints after 4 different actions. Largest state had 3 variables. [2018-12-08 20:42:13,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:13,954 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-08 20:42:13,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:13,954 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/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 [2018-12-08 20:42:13,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:42:13,960 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-08 20:42:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:13,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:42:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:13,969 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:42:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:14,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:42:14,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-12-08 20:42:14,001 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:42:14,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-08 20:42:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-08 20:42:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:42:14,001 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2018-12-08 20:42:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:42:14,020 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-12-08 20:42:14,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-08 20:42:14,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2018-12-08 20:42:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:42:14,021 INFO L225 Difference]: With dead ends: 31 [2018-12-08 20:42:14,021 INFO L226 Difference]: Without dead ends: 21 [2018-12-08 20:42:14,021 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-12-08 20:42:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-08 20:42:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-12-08 20:42:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-08 20:42:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-12-08 20:42:14,024 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2018-12-08 20:42:14,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:42:14,025 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-12-08 20:42:14,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-08 20:42:14,025 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-12-08 20:42:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-08 20:42:14,025 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:42:14,025 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:42:14,026 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:42:14,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:14,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 2 times [2018-12-08 20:42:14,026 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:42:14,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:14,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-08 20:42:14,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:14,027 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:42:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:14,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:14,056 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:42:14,056 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:42:14,056 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:42:14,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:14,056 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:42:14,064 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-08 20:42:14,064 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-08 20:42:14,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-08 20:42:14,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:42:14,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:42:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:42:14,100 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:42:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-08 20:42:14,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:42:14,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2018-12-08 20:42:14,149 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:42:14,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-08 20:42:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-08 20:42:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 20:42:14,150 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2018-12-08 20:42:14,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:42:14,171 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2018-12-08 20:42:14,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-08 20:42:14,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-12-08 20:42:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:42:14,172 INFO L225 Difference]: With dead ends: 38 [2018-12-08 20:42:14,173 INFO L226 Difference]: Without dead ends: 28 [2018-12-08 20:42:14,173 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 20:42:14,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-12-08 20:42:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2018-12-08 20:42:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-12-08 20:42:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-12-08 20:42:14,176 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2018-12-08 20:42:14,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:42:14,176 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-12-08 20:42:14,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-08 20:42:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-12-08 20:42:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-08 20:42:14,177 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:42:14,177 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:42:14,177 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:42:14,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:14,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 3 times [2018-12-08 20:42:14,177 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:42:14,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:14,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:42:14,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:14,178 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:42:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-08 20:42:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:14,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:14,216 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-08 20:42:14,217 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-08 20:42:14,217 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-08 20:42:14,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-08 20:42:14,217 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-08 20:42:14,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-08 20:42:14,224 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-12-08 20:42:14,230 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-08 20:42:14,230 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-08 20:42:14,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-08 20:42:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:14,253 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-08 20:42:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-08 20:42:14,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-08 20:42:14,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2018-12-08 20:42:14,314 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-08 20:42:14,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-08 20:42:14,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-08 20:42:14,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 20:42:14,315 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 10 states. [2018-12-08 20:42:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-08 20:42:14,346 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2018-12-08 20:42:14,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-08 20:42:14,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-12-08 20:42:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-08 20:42:14,347 INFO L225 Difference]: With dead ends: 40 [2018-12-08 20:42:14,347 INFO L226 Difference]: Without dead ends: 35 [2018-12-08 20:42:14,347 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-12-08 20:42:14,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-12-08 20:42:14,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-12-08 20:42:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-12-08 20:42:14,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2018-12-08 20:42:14,350 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2018-12-08 20:42:14,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-08 20:42:14,350 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2018-12-08 20:42:14,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-08 20:42:14,351 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2018-12-08 20:42:14,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-12-08 20:42:14,351 INFO L394 BasicCegarLoop]: Found error trace [2018-12-08 20:42:14,351 INFO L402 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-08 20:42:14,351 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-08 20:42:14,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-08 20:42:14,351 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 4 times [2018-12-08 20:42:14,352 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-08 20:42:14,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:14,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-08 20:42:14,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-08 20:42:14,352 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-08 20:42:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 20:42:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-08 20:42:14,373 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-08 20:42:14,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.12 08:42:14 BoogieIcfgContainer [2018-12-08 20:42:14,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-08 20:42:14,388 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-08 20:42:14,388 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-08 20:42:14,388 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-08 20:42:14,389 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.12 08:42:13" (3/4) ... [2018-12-08 20:42:14,390 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-08 20:42:14,416 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d1c3687d-144c-49d5-a2ba-0bec430984c6/bin-2019/utaipan/witness.graphml [2018-12-08 20:42:14,417 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-08 20:42:14,417 INFO L168 Benchmark]: Toolchain (without parser) took 1290.32 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.0 MB). Free memory was 956.7 MB in the beginning and 885.3 MB in the end (delta: 71.4 MB). Peak memory consumption was 135.3 MB. Max. memory is 11.5 GB. [2018-12-08 20:42:14,418 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:42:14,418 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.37 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 945.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-08 20:42:14,418 INFO L168 Benchmark]: Boogie Procedure Inliner took 15.58 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:42:14,419 INFO L168 Benchmark]: Boogie Preprocessor took 15.40 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-08 20:42:14,419 INFO L168 Benchmark]: RCFGBuilder took 141.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.0 MB). Free memory was 945.9 MB in the beginning and 1.0 GB in the end (delta: -96.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. [2018-12-08 20:42:14,419 INFO L168 Benchmark]: TraceAbstraction took 962.69 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 892.6 MB in the end (delta: 149.7 MB). Peak memory consumption was 149.7 MB. Max. memory is 11.5 GB. [2018-12-08 20:42:14,419 INFO L168 Benchmark]: Witness Printer took 28.55 ms. Allocated memory is still 1.1 GB. Free memory was 892.6 MB in the beginning and 885.3 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2018-12-08 20:42:14,421 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 123.37 ms. Allocated memory is still 1.0 GB. Free memory was 956.7 MB in the beginning and 945.9 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 15.58 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.40 ms. Allocated memory is still 1.0 GB. Free memory is still 945.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 141.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 64.0 MB). Free memory was 945.9 MB in the beginning and 1.0 GB in the end (delta: -96.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 962.69 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 892.6 MB in the end (delta: 149.7 MB). Peak memory consumption was 149.7 MB. Max. memory is 11.5 GB. * Witness Printer took 28.55 ms. Allocated memory is still 1.1 GB. Free memory was 892.6 MB in the beginning and 885.3 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 VAL [i=1, sn=0] [L13] COND TRUE i<=8 VAL [i=1, sn=0] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=1, sn=2] [L13] i++ VAL [i=2, sn=2] [L13] COND TRUE i<=8 VAL [i=2, sn=2] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=2, sn=4] [L13] i++ VAL [i=3, sn=4] [L13] COND TRUE i<=8 VAL [i=3, sn=4] [L14] COND TRUE i<4 [L15] sn = sn + (2) VAL [i=3, sn=6] [L13] i++ VAL [i=4, sn=6] [L13] COND TRUE i<=8 VAL [i=4, sn=6] [L14] COND FALSE !(i<4) VAL [i=4, sn=6] [L13] i++ VAL [i=5, sn=6] [L13] COND TRUE i<=8 VAL [i=5, sn=6] [L14] COND FALSE !(i<4) VAL [i=5, sn=6] [L13] i++ VAL [i=6, sn=6] [L13] COND TRUE i<=8 VAL [i=6, sn=6] [L14] COND FALSE !(i<4) VAL [i=6, sn=6] [L13] i++ VAL [i=7, sn=6] [L13] COND TRUE i<=8 VAL [i=7, sn=6] [L14] COND FALSE !(i<4) VAL [i=7, sn=6] [L13] i++ VAL [i=8, sn=6] [L13] COND TRUE i<=8 VAL [i=8, sn=6] [L14] COND FALSE !(i<4) VAL [i=8, sn=6] [L13] i++ VAL [i=9, sn=6] [L13] COND FALSE !(i<=8) VAL [i=9, sn=6] [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 0.9s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 41 SDslu, 112 SDs, 0 SdLazy, 90 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 200 NumberOfCodeBlocks, 199 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 225 ConstructedInterpolants, 0 QuantifiedInterpolants, 7389 SizeOfPredicates, 6 NumberOfNonLiveVariables, 150 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 54/159 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...