./Ultimate.py --spec ../../sv-benchmarks/c/ReachSafety.prp --file ../../sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i -s /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/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 f2964994cdaa1e60b18f6e8e9960cc97625ea606 ............................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 11:31:11,479 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:31:11,480 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:31:11,489 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:31:11,489 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:31:11,490 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:31:11,491 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:31:11,492 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:31:11,493 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:31:11,494 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:31:11,495 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:31:11,495 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:31:11,496 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:31:11,497 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:31:11,498 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:31:11,499 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:31:11,500 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:31:11,501 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:31:11,502 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:31:11,504 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:31:11,504 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:31:11,505 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:31:11,508 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:31:11,508 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:31:11,508 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:31:11,509 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:31:11,509 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:31:11,510 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:31:11,511 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:31:11,512 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:31:11,512 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:31:11,513 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:31:11,513 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:31:11,513 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:31:11,514 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:31:11,514 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:31:11,515 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-18 11:31:11,525 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:31:11,525 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:31:11,526 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 11:31:11,527 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 11:31:11,527 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 11:31:11,527 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 11:31:11,527 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 11:31:11,527 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 11:31:11,527 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 11:31:11,527 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 11:31:11,528 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 11:31:11,528 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 11:31:11,528 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 11:31:11,528 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:31:11,529 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 11:31:11,529 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:31:11,529 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 11:31:11,529 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:31:11,529 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 11:31:11,529 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 11:31:11,529 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 11:31:11,530 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 11:31:11,530 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:31:11,530 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:31:11,530 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 11:31:11,530 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:31:11,532 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:31:11,532 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 11:31:11,532 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 11:31:11,532 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 11:31:11,533 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:31:11,533 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 11:31:11,533 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 11:31:11,533 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 11:31:11,533 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 11:31:11,533 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 11:31:11,533 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-18 11:31:11,534 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_35973cf3-2960-4f22-b3f8-402050f95d87/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 -> f2964994cdaa1e60b18f6e8e9960cc97625ea606 [2018-11-18 11:31:11,557 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:31:11,568 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:31:11,570 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:31:11,572 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:31:11,572 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:31:11,573 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/../../sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i [2018-11-18 11:31:11,618 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/data/625925423/a42d5a263fe844a5b92d225dcc8af6bd/FLAG608422f02 [2018-11-18 11:31:11,970 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:31:11,970 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/sv-benchmarks/c/bitvector/sum02_false-unreach-call_true-no-overflow.i [2018-11-18 11:31:11,974 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/data/625925423/a42d5a263fe844a5b92d225dcc8af6bd/FLAG608422f02 [2018-11-18 11:31:11,984 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/data/625925423/a42d5a263fe844a5b92d225dcc8af6bd [2018-11-18 11:31:11,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:31:11,987 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:31:11,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:31:11,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:31:11,990 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:31:11,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:31:11" (1/1) ... [2018-11-18 11:31:11,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a19fc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:11, skipping insertion in model container [2018-11-18 11:31:11,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:31:11" (1/1) ... [2018-11-18 11:31:11,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:31:12,013 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:31:12,127 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:31:12,129 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:31:12,140 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:31:12,149 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:31:12,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12 WrapperNode [2018-11-18 11:31:12,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:31:12,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:31:12,150 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:31:12,150 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:31:12,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:31:12,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:31:12,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:31:12,165 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:31:12,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... [2018-11-18 11:31:12,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:31:12,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:31:12,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:31:12,179 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:31:12,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/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 11:31:12,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 11:31:12,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 11:31:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:31:12,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:31:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 11:31:12,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 11:31:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-18 11:31:12,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-18 11:31:12,350 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:31:12,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:31:12 BoogieIcfgContainer [2018-11-18 11:31:12,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:31:12,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 11:31:12,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 11:31:12,353 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 11:31:12,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 11:31:11" (1/3) ... [2018-11-18 11:31:12,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9a343c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:31:12, skipping insertion in model container [2018-11-18 11:31:12,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:31:12" (2/3) ... [2018-11-18 11:31:12,354 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9a343c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 11:31:12, skipping insertion in model container [2018-11-18 11:31:12,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:31:12" (3/3) ... [2018-11-18 11:31:12,355 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02_false-unreach-call_true-no-overflow.i [2018-11-18 11:31:12,361 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 11:31:12,366 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-18 11:31:12,375 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-18 11:31:12,396 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 11:31:12,396 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 11:31:12,396 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 11:31:12,396 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:31:12,396 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:31:12,397 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 11:31:12,397 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:31:12,397 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 11:31:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-11-18 11:31:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 11:31:12,414 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:12,415 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:12,416 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:12,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:12,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1870586046, now seen corresponding path program 1 times [2018-11-18 11:31:12,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:31:12,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:12,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:12,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:12,454 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:31:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:12,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:12,491 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:31:12,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 11:31:12,492 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:31:12,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 11:31:12,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 11:31:12,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:31:12,505 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2018-11-18 11:31:12,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:12,520 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-18 11:31:12,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 11:31:12,521 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-18 11:31:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:12,526 INFO L225 Difference]: With dead ends: 30 [2018-11-18 11:31:12,526 INFO L226 Difference]: Without dead ends: 13 [2018-11-18 11:31:12,528 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 11:31:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-18 11:31:12,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-18 11:31:12,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-18 11:31:12,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-18 11:31:12,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-11-18 11:31:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:12,553 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-18 11:31:12,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 11:31:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-18 11:31:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 11:31:12,554 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:12,554 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:12,554 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:12,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1861068280, now seen corresponding path program 1 times [2018-11-18 11:31:12,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:31:12,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:12,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:12,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:12,556 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:31:12,564 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 11:31:12,564 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 11:31:12,565 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 11:31:12,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:12,577 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 11:31:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:12,619 INFO L190 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-11-18 11:31:12,619 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 11:31:12,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:31:12,620 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 11:31:12,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:12,628 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:31:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:12,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:31:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:12,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:31:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:12,726 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:31:12,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2018-11-18 11:31:12,726 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 11:31:12,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 11:31:12,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 11:31:12,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 11:31:12,727 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2018-11-18 11:31:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:12,746 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-18 11:31:12,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 11:31:12,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-11-18 11:31:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:12,747 INFO L225 Difference]: With dead ends: 21 [2018-11-18 11:31:12,747 INFO L226 Difference]: Without dead ends: 16 [2018-11-18 11:31:12,747 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 11:31:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-18 11:31:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2018-11-18 11:31:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-18 11:31:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-18 11:31:12,750 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2018-11-18 11:31:12,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:12,750 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-18 11:31:12,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 11:31:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-18 11:31:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 11:31:12,751 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:12,751 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:12,751 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:12,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash 996352094, now seen corresponding path program 1 times [2018-11-18 11:31:12,752 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:31:12,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:12,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:12,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:12,752 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:31:12,760 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 11:31:12,760 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 11:31:12,761 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 11:31:12,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:12,779 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 11:31:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:12,800 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-11-18 11:31:12,801 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [15], [21], [24], [26], [32], [33], [34], [36] [2018-11-18 11:31:12,823 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 11:31:12,824 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 11:31:13,054 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 11:31:13,055 INFO L272 AbstractInterpreter]: Visited 13 different actions 43 times. Merged at 4 different actions 16 times. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 16. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-11-18 11:31:13,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:13,069 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 11:31:13,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 11:31:13,069 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/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 [2018-11-18 11:31:13,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:13,086 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 11:31:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:31:13,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:31:13,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:13,180 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 11:31:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:31:13,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 11:31:13,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-11-18 11:31:13,359 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 11:31:13,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 11:31:13,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 11:31:13,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-11-18 11:31:13,360 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2018-11-18 11:31:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:31:13,441 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-11-18 11:31:13,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 11:31:13,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2018-11-18 11:31:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 11:31:13,442 INFO L225 Difference]: With dead ends: 23 [2018-11-18 11:31:13,442 INFO L226 Difference]: Without dead ends: 18 [2018-11-18 11:31:13,442 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-18 11:31:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-18 11:31:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-18 11:31:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 11:31:13,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-11-18 11:31:13,445 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 14 [2018-11-18 11:31:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 11:31:13,446 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-11-18 11:31:13,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 11:31:13,446 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-11-18 11:31:13,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 11:31:13,446 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 11:31:13,446 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:31:13,447 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-18 11:31:13,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:31:13,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1450296376, now seen corresponding path program 2 times [2018-11-18 11:31:13,447 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 11:31:13,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:13,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:31:13,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:31:13,448 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 11:31:13,456 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-11-18 11:31:13,456 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-11-18 11:31:13,456 INFO L169 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_35973cf3-2960-4f22-b3f8-402050f95d87/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-11-18 11:31:13,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 11:31:13,471 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-11-18 11:31:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2018-11-18 11:31:15,497 INFO L285 seRefinementStrategy]: Strategy TaipanRefinementStrategy was unsuccessful and could not determine trace feasibility. [2018-11-18 11:31:15,497 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 11:31:15,509 WARN L208 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2018-11-18 11:31:15,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 11:31:15 BoogieIcfgContainer [2018-11-18 11:31:15,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 11:31:15,509 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:31:15,509 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:31:15,509 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:31:15,510 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:31:12" (3/4) ... [2018-11-18 11:31:15,512 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 11:31:15,512 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:31:15,513 INFO L168 Benchmark]: Toolchain (without parser) took 3526.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 959.3 MB in the beginning and 991.6 MB in the end (delta: -32.4 MB). Peak memory consumption was 102.4 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:15,514 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:31:15,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 162.42 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:15,515 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.29 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:31:15,515 INFO L168 Benchmark]: Boogie Preprocessor took 13.91 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:15,515 INFO L168 Benchmark]: RCFGBuilder took 172.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:15,516 INFO L168 Benchmark]: TraceAbstraction took 3157.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 991.6 MB in the end (delta: 125.4 MB). Peak memory consumption was 125.4 MB. Max. memory is 11.5 GB. [2018-11-18 11:31:15,516 INFO L168 Benchmark]: Witness Printer took 3.33 ms. Allocated memory is still 1.2 GB. Free memory is still 991.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:31:15,519 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 162.42 ms. Allocated memory is still 1.0 GB. Free memory was 959.3 MB in the beginning and 948.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.29 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.91 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 172.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3157.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 991.6 MB in the end (delta: 125.4 MB). Peak memory consumption was 125.4 MB. Max. memory is 11.5 GB. * Witness Printer took 3.33 ms. Allocated memory is still 1.2 GB. Free memory is still 991.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 5]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L11] unsigned int i, n=__VERIFIER_nondet_uint(), sn=0; [L11] unsigned int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] i=0 [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND TRUE i<=n [L13] sn = sn + i [L12] i++ [L12] COND FALSE !(i<=n) [L15] CALL __VERIFIER_assert(sn==(n*(n+1))/2 || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNKNOWN Result, 3.1s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 40 SDtfs, 2 SDslu, 73 SDs, 0 SdLazy, 32 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 2 QuantifiedInterpolants, 1553 SizeOfPredicates, 8 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...