./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call1_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/loop-acceleration/underapprox_true-unreach-call1_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 6a0edfd90480f917557019c272eaa2ec2221428a --rcfgbuilder.size.of.a.code.block LoopFreeBlock ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 10:14:14,611 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:14:14,616 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:14:14,632 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:14:14,632 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:14:14,633 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:14:14,635 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:14:14,637 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:14:14,639 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:14:14,640 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:14:14,641 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:14:14,641 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:14:14,642 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:14:14,643 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:14:14,644 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:14:14,645 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:14:14,646 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:14:14,648 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:14:14,651 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:14:14,653 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:14:14,654 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:14:14,655 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:14:14,659 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:14:14,659 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:14:14,660 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:14:14,664 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:14:14,665 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:14:14,666 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:14:14,666 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:14:14,668 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:14:14,671 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:14:14,672 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:14:14,672 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:14:14,672 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:14:14,675 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:14:14,676 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:14:14,676 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:14:14,696 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:14:14,696 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:14:14,697 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:14:14,697 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:14:14,698 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:14:14,698 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:14:14,698 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:14:14,698 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:14:14,698 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:14:14,699 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:14:14,700 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:14:14,700 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:14:14,701 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:14:14,701 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:14:14,701 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:14:14,701 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:14:14,701 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:14:14,702 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:14:14,703 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:14:14,703 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:14:14,703 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:14:14,703 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:14:14,703 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:14:14,703 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:14:14,704 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:14:14,704 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:14:14,704 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:14:14,704 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:14:14,704 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:14:14,705 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:14:14,706 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:14:14,706 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:14:14,706 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:14:14,707 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:14:14,707 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 -> 6a0edfd90480f917557019c272eaa2ec2221428a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:14:14,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:14:14,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:14:14,774 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:14:14,776 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:14:14,777 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:14:14,778 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call1_true-termination.i [2018-10-22 10:14:14,841 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c76c8ecc5/b6eaa0d4b48f42e8955daabd0cde0fae/FLAG871234775 [2018-10-22 10:14:15,278 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:14:15,279 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_true-unreach-call1_true-termination.i [2018-10-22 10:14:15,286 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c76c8ecc5/b6eaa0d4b48f42e8955daabd0cde0fae/FLAG871234775 [2018-10-22 10:14:15,303 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c76c8ecc5/b6eaa0d4b48f42e8955daabd0cde0fae [2018-10-22 10:14:15,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:14:15,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:14:15,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:14:15,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:14:15,317 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:14:15,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@528c740e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15, skipping insertion in model container [2018-10-22 10:14:15,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:14:15,355 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:14:15,509 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:14:15,512 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:14:15,527 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:14:15,540 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:14:15,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15 WrapperNode [2018-10-22 10:14:15,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:14:15,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:14:15,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:14:15,542 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:14:15,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,553 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,558 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:14:15,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:14:15,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:14:15,559 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:14:15,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,567 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (1/1) ... [2018-10-22 10:14:15,577 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:14:15,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:14:15,578 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:14:15,578 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:14:15,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (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 10:14:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:14:15,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:14:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:14:15,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:14:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:14:15,696 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:14:15,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:14:15,696 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:14:15,878 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:14:15,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:14:15 BoogieIcfgContainer [2018-10-22 10:14:15,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:14:15,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:14:15,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:14:15,883 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:14:15,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:14:15" (1/3) ... [2018-10-22 10:14:15,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3fc719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:14:15, skipping insertion in model container [2018-10-22 10:14:15,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:14:15" (2/3) ... [2018-10-22 10:14:15,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3fc719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:14:15, skipping insertion in model container [2018-10-22 10:14:15,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:14:15" (3/3) ... [2018-10-22 10:14:15,887 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_true-unreach-call1_true-termination.i [2018-10-22 10:14:15,896 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:14:15,903 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:14:15,918 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:14:15,950 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:14:15,951 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:14:15,951 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:14:15,952 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:14:15,952 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:14:15,952 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:14:15,952 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:14:15,952 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:14:15,952 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:14:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-22 10:14:15,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 10:14:15,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:15,976 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:15,978 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:15,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:15,984 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-10-22 10:14:15,986 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:16,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:16,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:14:16,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:16,037 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:16,096 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 10:14:16,099 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:14:16,099 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:14:16,099 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:14:16,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:14:16,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:14:16,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:14:16,123 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-22 10:14:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:14:16,145 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-22 10:14:16,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:14:16,147 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 10:14:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:14:16,158 INFO L225 Difference]: With dead ends: 29 [2018-10-22 10:14:16,158 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 10:14:16,163 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 10:14:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 10:14:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 10:14:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 10:14:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 10:14:16,205 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-22 10:14:16,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:14:16,206 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 10:14:16,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:14:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 10:14:16,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 10:14:16,207 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:16,207 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:16,207 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:16,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:16,208 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-10-22 10:14:16,208 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:16,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:16,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:14:16,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:16,214 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:16,376 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 10:14:16,376 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:14:16,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 10:14:16,377 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:14:16,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 10:14:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 10:14:16,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 10:14:16,380 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-22 10:14:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:14:16,433 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 10:14:16,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 10:14:16,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-22 10:14:16,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:14:16,447 INFO L225 Difference]: With dead ends: 19 [2018-10-22 10:14:16,447 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 10:14:16,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 10:14:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 10:14:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 10:14:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 10:14:16,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 10:14:16,453 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 10:14:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:14:16,453 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 10:14:16,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 10:14:16,454 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 10:14:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 10:14:16,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:16,457 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:16,458 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:16,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:16,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-10-22 10:14:16,458 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:16,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:16,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:14:16,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:16,463 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:16,693 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 10:14:16,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:16,694 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:14:16,695 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-22 10:14:16,696 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [20], [23], [25], [31], [32], [33], [35] [2018-10-22 10:14:16,740 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:14:16,741 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:14:16,858 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-22 10:14:17,235 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:14:17,237 INFO L272 AbstractInterpreter]: Visited 12 different actions 81 times. Merged at 3 different actions 31 times. Widened at 1 different actions 7 times. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-22 10:14:17,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:17,264 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:14:17,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:17,265 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) [2018-10-22 10:14:17,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:14:17,285 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:14:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:17,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:17,374 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 10:14:17,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:17,504 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 10:14:17,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:17,535 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 10:14:17,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:14:17,556 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:14:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:17,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:17,595 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 10:14:17,596 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:17,610 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 10:14:17,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:14:17,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 6 [2018-10-22 10:14:17,612 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:14:17,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 10:14:17,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 10:14:17,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-22 10:14:17,614 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-10-22 10:14:17,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:14:17,674 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 10:14:17,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 10:14:17,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-22 10:14:17,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:14:17,676 INFO L225 Difference]: With dead ends: 21 [2018-10-22 10:14:17,676 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 10:14:17,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-22 10:14:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 10:14:17,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 10:14:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 10:14:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 10:14:17,682 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 10:14:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:14:17,683 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 10:14:17,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 10:14:17,683 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 10:14:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 10:14:17,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:17,684 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:17,684 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:17,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:17,684 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-10-22 10:14:17,686 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:17,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:17,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:14:17,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:17,687 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:17,882 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 10:14:17,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:17,883 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:14:17,883 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:14:17,883 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:14:17,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:17,883 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 10:14:17,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:14:17,893 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:14:17,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:14:17,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:17,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:17,990 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 10:14:17,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:18,135 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 10:14:18,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:18,156 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 10:14:18,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:14:18,172 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:14:18,192 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:14:18,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:18,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:18,210 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 10:14:18,210 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:18,236 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 10:14:18,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:14:18,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 8 [2018-10-22 10:14:18,238 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:14:18,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 10:14:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 10:14:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-22 10:14:18,239 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-10-22 10:14:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:14:18,274 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-22 10:14:18,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:14:18,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-22 10:14:18,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:14:18,277 INFO L225 Difference]: With dead ends: 23 [2018-10-22 10:14:18,277 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 10:14:18,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-22 10:14:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 10:14:18,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 10:14:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 10:14:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 10:14:18,283 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-22 10:14:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:14:18,284 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 10:14:18,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 10:14:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 10:14:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 10:14:18,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:18,285 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:18,285 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:18,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:18,286 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 3 times [2018-10-22 10:14:18,286 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:18,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:18,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:14:18,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:18,288 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:18,460 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 10:14:18,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:18,461 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:14:18,461 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:14:18,463 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:14:18,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:18,463 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 10:14:18,480 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:14:18,480 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:14:18,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:14:18,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:18,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:18,595 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 10:14:18,595 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:18,702 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 10:14:18,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:18,727 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 10:14:18,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:14:18,743 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:14:18,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:14:18,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:18,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:18,798 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 10:14:18,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:18,810 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 10:14:18,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:14:18,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-10-22 10:14:18,811 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:14:18,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 10:14:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 10:14:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:14:18,813 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-10-22 10:14:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:14:18,913 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 10:14:18,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 10:14:18,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-22 10:14:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:14:18,916 INFO L225 Difference]: With dead ends: 25 [2018-10-22 10:14:18,917 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 10:14:18,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:14:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 10:14:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 10:14:18,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 10:14:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 10:14:18,923 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-22 10:14:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:14:18,923 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 10:14:18,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 10:14:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 10:14:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 10:14:18,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:18,924 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:18,924 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:18,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:18,924 INFO L82 PathProgramCache]: Analyzing trace with hash -873685328, now seen corresponding path program 4 times [2018-10-22 10:14:18,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:18,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:18,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:14:18,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:18,926 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:18,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:19,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:19,305 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:14:19,305 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:14:19,306 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:14:19,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:19,306 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:14:19,327 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:14:19,328 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:14:19,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:14:19,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:19,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:19,429 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:19,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:19,638 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 9 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 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:14:19,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:14:19,655 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:14:19,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:14:19,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:19,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:19,699 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:19,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:19,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:14:19,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7] total 12 [2018-10-22 10:14:19,713 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:14:19,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 10:14:19,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 10:14:19,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-10-22 10:14:19,715 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-10-22 10:14:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:14:19,868 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-22 10:14:19,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 10:14:19,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-22 10:14:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:14:19,871 INFO L225 Difference]: With dead ends: 27 [2018-10-22 10:14:19,871 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 10:14:19,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2018-10-22 10:14:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 10:14:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-22 10:14:19,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 10:14:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-22 10:14:19,878 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-22 10:14:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:14:19,878 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-22 10:14:19,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 10:14:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-22 10:14:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 10:14:19,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:19,881 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:19,881 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:19,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1097991946, now seen corresponding path program 5 times [2018-10-22 10:14:19,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:19,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:19,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:14:19,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:19,884 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:20,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:20,016 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:14:20,017 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:14:20,017 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:14:20,018 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:20,018 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:14:20,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:14:20,027 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:14:20,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 10:14:20,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:20,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:20,069 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:20,266 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:20,266 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 11 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 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:14:20,285 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 10:14:20,285 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:14:20,331 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 10:14:20,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:20,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:14:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:20,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:14:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:14:20,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:14:20,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 14 [2018-10-22 10:14:20,387 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:14:20,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 10:14:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 10:14:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-10-22 10:14:20,389 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-10-22 10:14:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:14:20,490 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-22 10:14:20,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 10:14:20,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-22 10:14:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:14:20,493 INFO L225 Difference]: With dead ends: 29 [2018-10-22 10:14:20,493 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 10:14:20,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2018-10-22 10:14:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 10:14:20,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-22 10:14:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-22 10:14:20,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-22 10:14:20,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-22 10:14:20,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:14:20,499 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-22 10:14:20,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 10:14:20,499 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-22 10:14:20,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-22 10:14:20,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:14:20,500 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:14:20,501 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:14:20,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:14:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1908287044, now seen corresponding path program 6 times [2018-10-22 10:14:20,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:14:20,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:20,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:14:20,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:14:20,505 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:14:20,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:14:22,896 WARN L832 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* 178956971 c_main_~y~0) 89478484))) (<= .cse0 (* 268435456 (div .cse0 268435456)))) is different from false [2018-10-22 10:14:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 12 times theorem prover too weak. 0 trivial. 12 not checked. [2018-10-22 10:14:50,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:50,725 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:14:50,725 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:14:50,726 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:14:50,726 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:14:50,726 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:14:50,736 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:14:50,736 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:14:50,773 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 10:14:50,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:14:50,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:15:01,007 WARN L179 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 19 [2018-10-22 10:15:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:15:03,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:16:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:19,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:16:19,584 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 13 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 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:16:19,599 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 10:16:19,599 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 10:16:19,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 10:16:19,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:16:19,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:16:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:27,355 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:16:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:30,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:16:30,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 26 [2018-10-22 10:16:30,983 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:16:30,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 10:16:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 10:16:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=446, Unknown=42, NotChecked=46, Total=650 [2018-10-22 10:16:30,984 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 19 states. [2018-10-22 10:16:32,493 WARN L179 SmtUtils]: Spent 946.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-10-22 10:16:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:16:32,535 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-22 10:16:32,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 10:16:32,536 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2018-10-22 10:16:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:16:32,536 INFO L225 Difference]: With dead ends: 31 [2018-10-22 10:16:32,537 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 10:16:32,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 131.1s TimeCoverageRelationStatistics Valid=122, Invalid=490, Unknown=42, NotChecked=48, Total=702 [2018-10-22 10:16:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 10:16:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-22 10:16:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 10:16:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 10:16:32,542 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2018-10-22 10:16:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:16:32,542 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 10:16:32,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 10:16:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 10:16:32,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 10:16:32,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:16:32,543 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:16:32,543 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:16:32,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:16:32,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1082171650, now seen corresponding path program 7 times [2018-10-22 10:16:32,544 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:16:32,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:16:32,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:16:32,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:16:32,545 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:16:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:16:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:33,185 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:16:33,185 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:16:33,185 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:16:33,185 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:16:33,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:16:33,186 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:16:33,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:16:33,195 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:16:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:16:33,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:16:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:33,228 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:16:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:33,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:16:33,509 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 15 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 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:16:33,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:16:33,525 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:16:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:16:33,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:16:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:33,576 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:16:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:16:33,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:16:33,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 16 [2018-10-22 10:16:33,634 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:16:33,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 10:16:33,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 10:16:33,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-10-22 10:16:33,635 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 9 states. [2018-10-22 10:16:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:16:33,715 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-22 10:16:33,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 10:16:33,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-22 10:16:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:16:33,719 INFO L225 Difference]: With dead ends: 26 [2018-10-22 10:16:33,719 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 10:16:33,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2018-10-22 10:16:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 10:16:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 10:16:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 10:16:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 10:16:33,721 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-10-22 10:16:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:16:33,721 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 10:16:33,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 10:16:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 10:16:33,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 10:16:33,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 10:16:33,829 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 10:16:33,829 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:16:33,829 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:16:33,829 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 10:16:33,829 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:16:33,829 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:16:33,829 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-10-22 10:16:33,829 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-10-22 10:16:33,830 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-10-22 10:16:33,830 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 14) no Hoare annotation was computed. [2018-10-22 10:16:33,830 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (or (and (exists ((v_main_~y~0_46 Int)) (and (= (* 4 v_main_~y~0_46) main_~y~0) (<= 1 v_main_~y~0_46) (<= v_main_~y~0_46 1))) (<= 2 main_~x~0) (<= main_~x~0 2)) (and (<= 5 main_~x~0) (exists ((v_main_~y~0_46 Int)) (and (<= 1 v_main_~y~0_46) (= main_~y~0 (* 32 v_main_~y~0_46)) (<= v_main_~y~0_46 1))) (<= main_~x~0 5)) (and (<= 1 main_~y~0) (<= main_~x~0 0) (<= main_~y~0 1) (<= 0 main_~x~0)) (and (<= main_~x~0 6) (exists ((v_main_~y~0_46 Int)) (and (<= 1 v_main_~y~0_46) (= main_~y~0 (* 64 v_main_~y~0_46)) (<= v_main_~y~0_46 1))) (<= 6 main_~x~0)) (and (<= main_~x~0 3) (exists ((v_main_~y~0_46 Int)) (and (<= 1 v_main_~y~0_46) (= main_~y~0 (* 8 v_main_~y~0_46)) (<= v_main_~y~0_46 1))) (<= 3 main_~x~0)) (and (<= 4 main_~x~0) (exists ((v_main_~y~0_46 Int)) (and (= main_~y~0 (* 16 v_main_~y~0_46)) (<= 1 v_main_~y~0_46) (<= v_main_~y~0_46 1))) (<= main_~x~0 4)) (and (exists ((v_main_~y~0_46 Int)) (and (<= 1 v_main_~y~0_46) (= (* 2 v_main_~y~0_46) main_~y~0) (<= v_main_~y~0_46 1))) (<= main_~x~0 1) (<= 1 main_~x~0))) [2018-10-22 10:16:33,830 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 14) the Hoare annotation is: (exists ((v_main_~y~0_46 Int)) (and (<= 1 v_main_~y~0_46) (= main_~y~0 (* 64 v_main_~y~0_46)) (<= v_main_~y~0_46 1))) [2018-10-22 10:16:33,830 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-22 10:16:33,830 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-22 10:16:33,831 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-22 10:16:33,831 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-22 10:16:33,831 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-22 10:16:33,831 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-22 10:16:33,838 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,839 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,839 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,840 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,840 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,840 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,840 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,841 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,841 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,841 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,841 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,844 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,844 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,844 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,845 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,846 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,846 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,846 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,856 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,856 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,857 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,857 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,857 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,858 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,858 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,858 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,858 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,860 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,861 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,861 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,861 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,861 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,861 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,862 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,863 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,864 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:16:33 BoogieIcfgContainer [2018-10-22 10:16:33,868 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:16:33,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:16:33,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:16:33,870 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:16:33,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:14:15" (3/4) ... [2018-10-22 10:16:33,875 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 10:16:33,880 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 10:16:33,881 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 10:16:33,881 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 10:16:33,886 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-10-22 10:16:33,886 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-22 10:16:33,886 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-22 10:16:33,917 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((((\exists v_main_~y~0_46 : int :: (4 * v_main_~y~0_46 == y && 1 <= v_main_~y~0_46) && v_main_~y~0_46 <= 1) && 2 <= x) && x <= 2) || ((5 <= x && (\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && y == 32 * v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && x <= 5)) || (((1 <= y && x <= 0) && y <= 1) && 0 <= x)) || ((x <= 6 && (\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && y == 64 * v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && 6 <= x)) || ((x <= 3 && (\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && y == 8 * v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && 3 <= x)) || ((4 <= x && (\exists v_main_~y~0_46 : int :: (y == 16 * v_main_~y~0_46 && 1 <= v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && x <= 4)) || (((\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && 2 * v_main_~y~0_46 == y) && v_main_~y~0_46 <= 1) && x <= 1) && 1 <= x) [2018-10-22 10:16:33,932 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:16:33,932 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:16:33,933 INFO L168 Benchmark]: Toolchain (without parser) took 138624.75 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 216.5 MB). Free memory was 953.2 MB in the beginning and 1.0 GB in the end (delta: -91.1 MB). Peak memory consumption was 125.4 MB. Max. memory is 11.5 GB. [2018-10-22 10:16:33,935 INFO L168 Benchmark]: CDTParser took 1.45 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 10:16:33,936 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.70 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:16:33,937 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.08 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:16:33,937 INFO L168 Benchmark]: Boogie Preprocessor took 18.91 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:16:33,938 INFO L168 Benchmark]: RCFGBuilder took 301.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -202.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2018-10-22 10:16:33,939 INFO L168 Benchmark]: TraceAbstraction took 137987.91 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.4 MB). Peak memory consumption was 156.5 MB. Max. memory is 11.5 GB. [2018-10-22 10:16:33,941 INFO L168 Benchmark]: Witness Printer took 63.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:16:33,945 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.45 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 227.70 ms. Allocated memory is still 1.0 GB. Free memory was 953.2 MB in the beginning and 942.4 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 17.08 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.91 ms. Allocated memory is still 1.0 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 301.35 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 160.4 MB). Free memory was 942.4 MB in the beginning and 1.1 GB in the end (delta: -202.2 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 137987.91 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 56.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.4 MB). Peak memory consumption was 156.5 MB. Max. memory is 11.5 GB. * Witness Printer took 63.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant [2018-10-22 10:16:33,961 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,961 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,961 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,961 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,962 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,965 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,965 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,965 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,965 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,966 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,966 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,966 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,966 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,966 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,966 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,967 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,967 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,967 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,968 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,968 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,968 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,968 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,969 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,969 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,969 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,969 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,969 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,970 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,973 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,973 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,973 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,973 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,974 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,974 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,974 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] [2018-10-22 10:16:33,974 WARN L387 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[v_main_~y~0_46,QUANTIFIED] Derived loop invariant: ((((((((\exists v_main_~y~0_46 : int :: (4 * v_main_~y~0_46 == y && 1 <= v_main_~y~0_46) && v_main_~y~0_46 <= 1) && 2 <= x) && x <= 2) || ((5 <= x && (\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && y == 32 * v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && x <= 5)) || (((1 <= y && x <= 0) && y <= 1) && 0 <= x)) || ((x <= 6 && (\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && y == 64 * v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && 6 <= x)) || ((x <= 3 && (\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && y == 8 * v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && 3 <= x)) || ((4 <= x && (\exists v_main_~y~0_46 : int :: (y == 16 * v_main_~y~0_46 && 1 <= v_main_~y~0_46) && v_main_~y~0_46 <= 1)) && x <= 4)) || (((\exists v_main_~y~0_46 : int :: (1 <= v_main_~y~0_46 && 2 * v_main_~y~0_46 == y) && v_main_~y~0_46 <= 1) && x <= 1) && 1 <= x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. SAFE Result, 137.8s OverallTime, 9 OverallIterations, 8 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 127 SDtfs, 2 SDslu, 518 SDs, 0 SdLazy, 304 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 575 GetRequests, 476 SyntacticMatches, 19 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 133.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.5s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 23 NumberOfFragments, 152 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 133.6s InterpolantComputationTime, 420 NumberOfCodeBlocks, 420 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 649 ConstructedInterpolants, 30 QuantifiedInterpolants, 64069 SizeOfPredicates, 14 NumberOfNonLiveVariables, 686 ConjunctsInSsa, 160 ConjunctsInUnsatCore, 37 InterpolantComputations, 2 PerfectInterpolantSequences, 70/840 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...