./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i --full-output --rcfgbuilder.size.of.a.code.block LoopFreeBlock --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --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 1b149b3cef099476d14a8b122afb66552d0406eb --rcfgbuilder.size.of.a.code.block LoopFreeBlock ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.23-0210da8 [2018-10-22 10:04:22,626 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:04:22,628 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:04:22,640 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:04:22,641 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:04:22,642 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:04:22,643 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:04:22,645 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:04:22,647 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:04:22,648 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:04:22,649 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:04:22,650 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:04:22,651 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:04:22,651 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:04:22,653 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:04:22,654 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:04:22,655 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:04:22,657 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:04:22,659 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:04:22,661 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:04:22,662 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:04:22,663 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:04:22,666 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:04:22,666 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:04:22,666 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:04:22,667 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:04:22,669 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:04:22,669 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:04:22,670 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:04:22,672 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:04:22,672 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:04:22,673 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:04:22,673 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:04:22,673 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:04:22,675 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:04:22,675 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:04:22,676 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:04:22,691 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:04:22,692 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:04:22,693 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:04:22,693 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:04:22,693 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:04:22,693 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:04:22,693 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:04:22,694 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:04:22,694 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:04:22,695 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:04:22,695 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:04:22,695 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:04:22,696 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:04:22,696 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:04:22,696 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:04:22,696 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:04:22,696 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:04:22,696 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:04:22,698 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:04:22,698 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:04:22,698 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:04:22,698 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:04:22,699 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:04:22,699 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:04:22,699 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:04:22,699 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:04:22,699 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:04:22,699 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:04:22,700 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:04:22,700 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:04:22,700 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:04:22,700 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:04:22,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:04:22,700 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:04:22,701 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 -> 1b149b3cef099476d14a8b122afb66552d0406eb Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:04:22,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:04:22,784 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:04:22,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:04:22,790 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:04:22,790 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:04:22,791 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-22 10:04:22,854 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/02a9917ad/258c9b4fd72644e4aeeb5d6dd33c38f2/FLAG0f426d67e [2018-10-22 10:04:23,315 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:04:23,316 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-22 10:04:23,322 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/02a9917ad/258c9b4fd72644e4aeeb5d6dd33c38f2/FLAG0f426d67e [2018-10-22 10:04:23,340 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/02a9917ad/258c9b4fd72644e4aeeb5d6dd33c38f2 [2018-10-22 10:04:23,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:04:23,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:04:23,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:04:23,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:04:23,352 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:04:23,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f97847e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23, skipping insertion in model container [2018-10-22 10:04:23,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:04:23,387 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:04:23,633 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:04:23,638 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:04:23,659 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:04:23,674 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:04:23,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23 WrapperNode [2018-10-22 10:04:23,675 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:04:23,676 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:04:23,676 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:04:23,676 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:04:23,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:04:23,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:04:23,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:04:23,695 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:04:23,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... [2018-10-22 10:04:23,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:04:23,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:04:23,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:04:23,718 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:04:23,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:04:23,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:04:23,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:04:23,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:04:23,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:04:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:04:23,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:04:23,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:04:23,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:04:24,214 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:04:24,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:04:24 BoogieIcfgContainer [2018-10-22 10:04:24,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:04:24,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:04:24,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:04:24,226 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:04:24,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:04:23" (1/3) ... [2018-10-22 10:04:24,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d96734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:04:24, skipping insertion in model container [2018-10-22 10:04:24,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:04:23" (2/3) ... [2018-10-22 10:04:24,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d96734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:04:24, skipping insertion in model container [2018-10-22 10:04:24,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:04:24" (3/3) ... [2018-10-22 10:04:24,232 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-10-22 10:04:24,240 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:04:24,247 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:04:24,264 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:04:24,299 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:04:24,300 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:04:24,300 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:04:24,300 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:04:24,301 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:04:24,301 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:04:24,301 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:04:24,302 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:04:24,302 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:04:24,319 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-22 10:04:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 10:04:24,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:24,327 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:24,329 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:24,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:24,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-10-22 10:04:24,338 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:24,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:24,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:24,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:24,387 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:24,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:04:24,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:04:24,465 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:04:24,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:04:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:04:24,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:04:24,490 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-22 10:04:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:04:24,512 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-22 10:04:24,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:04:24,514 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 10:04:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:04:24,523 INFO L225 Difference]: With dead ends: 29 [2018-10-22 10:04:24,524 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 10:04:24,527 INFO L605 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 [2018-10-22 10:04:24,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 10:04:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 10:04:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 10:04:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 10:04:24,562 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-22 10:04:24,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:04:24,562 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 10:04:24,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:04:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 10:04:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 10:04:24,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:24,564 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:24,565 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:24,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:24,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-10-22 10:04:24,566 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:24,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:24,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:24,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:24,567 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:24,698 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:04:24,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-22 10:04:24,698 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:04:24,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 10:04:24,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 10:04:24,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-22 10:04:24,701 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-10-22 10:04:24,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:04:24,782 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 10:04:24,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:04:24,783 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-10-22 10:04:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:04:24,784 INFO L225 Difference]: With dead ends: 19 [2018-10-22 10:04:24,784 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 10:04:24,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-22 10:04:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 10:04:24,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 10:04:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 10:04:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 10:04:24,791 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 10:04:24,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:04:24,791 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 10:04:24,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 10:04:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 10:04:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 10:04:24,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:24,793 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:24,793 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:24,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:24,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1764172798, now seen corresponding path program 1 times [2018-10-22 10:04:24,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:24,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:24,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:24,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:24,796 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:25,131 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-22 10:04:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:25,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:25,187 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:04:25,188 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-22 10:04:25,190 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [26], [29], [31], [37], [38], [39], [41], [45] [2018-10-22 10:04:25,240 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:04:25,240 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:04:25,372 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 10:04:25,804 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:04:25,806 INFO L272 AbstractInterpreter]: Visited 12 different actions 102 times. Merged at 3 different actions 39 times. Widened at 1 different actions 9 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-10-22 10:04:25,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:25,855 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:04:25,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:25,856 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:04:25,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:25,872 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:04:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:25,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:04:26,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:26,335 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:04:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:26,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:26,834 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:04:26,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:26,855 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:04:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:26,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:04:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:26,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:04:26,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:26,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:04:26,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 15 [2018-10-22 10:04:26,955 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:04:26,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 10:04:26,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 10:04:26,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2018-10-22 10:04:26,957 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-10-22 10:04:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:04:27,171 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 10:04:27,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 10:04:27,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-10-22 10:04:27,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:04:27,172 INFO L225 Difference]: With dead ends: 21 [2018-10-22 10:04:27,172 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 10:04:27,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-10-22 10:04:27,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 10:04:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 10:04:27,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 10:04:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 10:04:27,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 10:04:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:04:27,179 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 10:04:27,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 10:04:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 10:04:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 10:04:27,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:27,180 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:27,180 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:27,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 294115943, now seen corresponding path program 2 times [2018-10-22 10:04:27,181 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:27,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:04:27,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:27,182 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:27,790 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-10-22 10:04:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:27,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:27,977 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:04:27,978 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:04:27,978 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:04:27,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:27,978 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:04:27,997 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:04:27,997 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:04:28,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:04:28,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:04:28,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:04:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:28,145 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:04:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:28,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:28,580 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:04:28,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:04:28,598 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:04:28,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:04:28,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:04:28,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:04:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:28,644 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:04:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:28,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:04:28,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 18 [2018-10-22 10:04:28,705 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:04:28,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 10:04:28,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 10:04:28,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-10-22 10:04:28,707 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 12 states. [2018-10-22 10:04:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:04:29,046 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-22 10:04:29,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 10:04:29,047 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-10-22 10:04:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:04:29,049 INFO L225 Difference]: With dead ends: 23 [2018-10-22 10:04:29,049 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 10:04:29,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2018-10-22 10:04:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 10:04:29,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 10:04:29,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 10:04:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 10:04:29,055 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-22 10:04:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:04:29,055 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 10:04:29,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 10:04:29,055 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 10:04:29,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 10:04:29,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:29,057 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:29,057 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:29,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:29,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1670327412, now seen corresponding path program 3 times [2018-10-22 10:04:29,058 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:29,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:29,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:04:29,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:29,060 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:04:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:29,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:29,365 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:04:29,366 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:04:29,366 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:04:29,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:29,366 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:04:29,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:04:29,376 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:04:29,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:04:29,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:04:29,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:04:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:29,533 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:04:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:29,988 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:04:29,988 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:04:30,007 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:04:30,008 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:04:30,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:04:30,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:04:30,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:04:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:30,218 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:04:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:04:30,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:04:30,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 21 [2018-10-22 10:04:30,636 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:04:30,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 10:04:30,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 10:04:30,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2018-10-22 10:04:30,638 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 14 states. [2018-10-22 10:04:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:04:30,894 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 10:04:30,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 10:04:30,896 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2018-10-22 10:04:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:04:30,897 INFO L225 Difference]: With dead ends: 25 [2018-10-22 10:04:30,897 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 10:04:30,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2018-10-22 10:04:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 10:04:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 10:04:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 10:04:30,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 10:04:30,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-22 10:04:30,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:04:30,903 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 10:04:30,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 10:04:30,904 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 10:04:30,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 10:04:30,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:04:30,904 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:04:30,904 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:04:30,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:04:30,906 INFO L82 PathProgramCache]: Analyzing trace with hash 285218673, now seen corresponding path program 4 times [2018-10-22 10:04:30,906 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:04:30,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:30,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:04:30,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:04:30,907 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:04:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 10:04:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-22 10:04:30,951 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-22 10:04:30,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:04:30 BoogieIcfgContainer [2018-10-22 10:04:30,974 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:04:30,975 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:04:30,975 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:04:30,975 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:04:30,975 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:04:24" (3/4) ... [2018-10-22 10:04:30,978 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-10-22 10:04:31,031 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:04:31,031 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:04:31,032 INFO L168 Benchmark]: Toolchain (without parser) took 7686.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 201.3 MB). Free memory was 951.8 MB in the beginning and 1.2 GB in the end (delta: -226.9 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:31,033 INFO L168 Benchmark]: CDTParser took 0.26 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. [2018-10-22 10:04:31,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 328.12 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:04:31,035 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.17 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:31,036 INFO L168 Benchmark]: Boogie Preprocessor took 22.91 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:31,036 INFO L168 Benchmark]: RCFGBuilder took 496.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -164.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-22 10:04:31,038 INFO L168 Benchmark]: TraceAbstraction took 6759.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -72.7 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:31,039 INFO L168 Benchmark]: Witness Printer took 56.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:04:31,043 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 328.12 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 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 18.17 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.91 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 496.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -164.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6759.09 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 67.1 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -72.7 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 56.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. 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, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ VAL [i=2, n=4, n=2] [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND FALSE !(i==4) [L13] i++ VAL [i=4, n=4, n=6] [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ VAL [i=5, n=-10, n=4] [L13] COND FALSE !(i<=n) VAL [i=5, n=4, n=-10] [L17] CALL __VERIFIER_assert(sn==n*(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, 20 locations, 1 error locations. UNSAFE Result, 6.6s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 61 SDtfs, 9 SDslu, 229 SDs, 0 SdLazy, 143 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 215 GetRequests, 147 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 175 NumberOfCodeBlocks, 175 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 229 ConstructedInterpolants, 24 QuantifiedInterpolants, 26873 SizeOfPredicates, 24 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 0/100 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...