java -Xmx8000000000 -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 ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-27 15:36:18,688 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-27 15:36:18,690 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-27 15:36:18,701 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-27 15:36:18,701 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-27 15:36:18,702 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-27 15:36:18,704 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-27 15:36:18,705 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-27 15:36:18,707 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-27 15:36:18,708 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-27 15:36:18,709 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-27 15:36:18,709 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-27 15:36:18,710 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-27 15:36:18,711 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-27 15:36:18,712 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-27 15:36:18,713 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-27 15:36:18,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-27 15:36:18,715 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-27 15:36:18,717 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-27 15:36:18,719 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-27 15:36:18,720 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-27 15:36:18,721 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-27 15:36:18,723 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-27 15:36:18,724 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-27 15:36:18,724 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-27 15:36:18,725 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-27 15:36:18,726 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-27 15:36:18,727 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-27 15:36:18,727 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-27 15:36:18,729 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-27 15:36:18,729 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-27 15:36:18,729 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-27 15:36:18,732 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-10-27 15:36:18,763 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-27 15:36:18,763 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-27 15:36:18,764 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-27 15:36:18,764 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-27 15:36:18,765 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-27 15:36:18,766 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-27 15:36:18,766 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-27 15:36:18,766 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-27 15:36:18,766 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-27 15:36:18,767 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-27 15:36:18,768 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-27 15:36:18,768 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-27 15:36:18,769 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-27 15:36:18,769 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-27 15:36:18,769 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-27 15:36:18,769 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-27 15:36:18,770 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-27 15:36:18,770 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-27 15:36:18,770 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-27 15:36:18,770 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-27 15:36:18,770 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-27 15:36:18,771 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-27 15:36:18,771 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-27 15:36:18,771 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-27 15:36:18,771 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-27 15:36:18,771 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-27 15:36:18,772 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-27 15:36:18,773 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-27 15:36:18,773 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-27 15:36:18,773 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-27 15:36:18,774 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-27 15:36:18,774 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-27 15:36:18,774 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-27 15:36:18,774 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-27 15:36:18,842 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-27 15:36:18,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-27 15:36:18,859 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-27 15:36:18,860 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-27 15:36:18,861 INFO L276 PluginConnector]: CDTParser initialized [2018-10-27 15:36:18,862 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-10-27 15:36:18,918 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2cb77cd87/4e8faf17e2cb4c3daa663e68eb5d863e/FLAG408d1671e [2018-10-27 15:36:19,370 INFO L298 CDTParser]: Found 1 translation units. [2018-10-27 15:36:19,370 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_true-unreach-call1.i [2018-10-27 15:36:19,381 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2cb77cd87/4e8faf17e2cb4c3daa663e68eb5d863e/FLAG408d1671e [2018-10-27 15:36:19,398 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2cb77cd87/4e8faf17e2cb4c3daa663e68eb5d863e [2018-10-27 15:36:19,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-27 15:36:19,410 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-27 15:36:19,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-27 15:36:19,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-27 15:36:19,414 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-27 15:36:19,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe75bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19, skipping insertion in model container [2018-10-27 15:36:19,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-27 15:36:19,444 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-27 15:36:19,615 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:36:19,619 INFO L189 MainTranslator]: Completed pre-run [2018-10-27 15:36:19,636 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-27 15:36:19,652 INFO L193 MainTranslator]: Completed translation [2018-10-27 15:36:19,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19 WrapperNode [2018-10-27 15:36:19,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-27 15:36:19,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-27 15:36:19,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-27 15:36:19,653 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-27 15:36:19,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-27 15:36:19,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-27 15:36:19,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-27 15:36:19,676 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-27 15:36:19,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,700 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (1/1) ... [2018-10-27 15:36:19,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-27 15:36:19,702 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-27 15:36:19,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-27 15:36:19,703 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-27 15:36:19,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (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 [2018-10-27 15:36:19,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-27 15:36:19,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-27 15:36:19,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-27 15:36:19,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-27 15:36:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-27 15:36:19,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-27 15:36:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-27 15:36:19,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-27 15:36:20,027 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-27 15:36:20,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:36:20 BoogieIcfgContainer [2018-10-27 15:36:20,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-27 15:36:20,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-27 15:36:20,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-27 15:36:20,032 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-27 15:36:20,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 03:36:19" (1/3) ... [2018-10-27 15:36:20,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d576b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:36:20, skipping insertion in model container [2018-10-27 15:36:20,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 03:36:19" (2/3) ... [2018-10-27 15:36:20,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d576b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 03:36:20, skipping insertion in model container [2018-10-27 15:36:20,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 03:36:20" (3/3) ... [2018-10-27 15:36:20,035 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call1.i [2018-10-27 15:36:20,044 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-27 15:36:20,051 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-27 15:36:20,068 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-27 15:36:20,103 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-27 15:36:20,103 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-27 15:36:20,103 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-27 15:36:20,103 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-27 15:36:20,103 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-27 15:36:20,104 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-27 15:36:20,104 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-27 15:36:20,104 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-27 15:36:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-10-27 15:36:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-27 15:36:20,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:36:20,129 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:36:20,132 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:36:20,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:36:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash -283544510, now seen corresponding path program 1 times [2018-10-27 15:36:20,141 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:36:20,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:36:20,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,195 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:36:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:36:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:36:20,257 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:36:20,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-27 15:36:20,257 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:36:20,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-27 15:36:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-27 15:36:20,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-27 15:36:20,276 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-10-27 15:36:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:36:20,297 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2018-10-27 15:36:20,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-27 15:36:20,298 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-27 15:36:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:36:20,307 INFO L225 Difference]: With dead ends: 37 [2018-10-27 15:36:20,307 INFO L226 Difference]: Without dead ends: 15 [2018-10-27 15:36:20,311 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 [2018-10-27 15:36:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-27 15:36:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-27 15:36:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-27 15:36:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-27 15:36:20,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-27 15:36:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:36:20,351 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-27 15:36:20,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-27 15:36:20,351 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-27 15:36:20,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-27 15:36:20,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:36:20,352 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:36:20,352 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:36:20,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:36:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash -863512858, now seen corresponding path program 1 times [2018-10-27 15:36:20,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:36:20,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:36:20,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,355 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:36:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:36:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:36:20,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:36:20,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 15:36:20,480 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:36:20,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 15:36:20,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 15:36:20,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:36:20,482 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2018-10-27 15:36:20,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:36:20,554 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-27 15:36:20,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 15:36:20,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-27 15:36:20,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:36:20,556 INFO L225 Difference]: With dead ends: 25 [2018-10-27 15:36:20,556 INFO L226 Difference]: Without dead ends: 20 [2018-10-27 15:36:20,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:36:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-27 15:36:20,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2018-10-27 15:36:20,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-27 15:36:20,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-27 15:36:20,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 11 [2018-10-27 15:36:20,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:36:20,564 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-27 15:36:20,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 15:36:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-27 15:36:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-27 15:36:20,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:36:20,566 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:36:20,566 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:36:20,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:36:20,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1427803270, now seen corresponding path program 1 times [2018-10-27 15:36:20,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:36:20,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:36:20,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,569 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:36:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:36:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:36:20,689 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-27 15:36:20,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-27 15:36:20,689 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:36:20,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-27 15:36:20,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-27 15:36:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:36:20,691 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2018-10-27 15:36:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:36:20,729 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-27 15:36:20,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-27 15:36:20,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-10-27 15:36:20,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:36:20,730 INFO L225 Difference]: With dead ends: 29 [2018-10-27 15:36:20,730 INFO L226 Difference]: Without dead ends: 19 [2018-10-27 15:36:20,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-27 15:36:20,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-27 15:36:20,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-27 15:36:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-27 15:36:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-27 15:36:20,736 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-27 15:36:20,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:36:20,737 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-27 15:36:20,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-27 15:36:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-27 15:36:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-27 15:36:20,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:36:20,738 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:36:20,738 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:36:20,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:36:20,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1523179828, now seen corresponding path program 1 times [2018-10-27 15:36:20,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:36:20,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:36:20,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:20,740 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:36:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:36:20,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:36:20,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:36:20,868 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:36:20,869 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 19 with the following transitions: [2018-10-27 15:36:20,871 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [18], [22], [24], [28], [34], [37], [39], [45], [46], [47], [49] [2018-10-27 15:36:20,902 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-10-27 15:36:20,902 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-27 15:36:21,009 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-27 15:36:21,323 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-27 15:36:21,325 INFO L272 AbstractInterpreter]: Visited 16 different actions 113 times. Merged at 7 different actions 60 times. Widened at 3 different actions 13 times. Found 14 fixpoints after 4 different actions. Largest state had 4 variables. [2018-10-27 15:36:21,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:36:21,380 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-27 15:36:21,380 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:36:21,380 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 15:36:21,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:36:21,395 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-27 15:36:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:36:21,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:36:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-27 15:36:21,846 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:36:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-27 15:36:22,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-27 15:36:22,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2018-10-27 15:36:22,078 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-27 15:36:22,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 15:36:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 15:36:22,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-10-27 15:36:22,080 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2018-10-27 15:36:22,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:36:22,316 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2018-10-27 15:36:22,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-27 15:36:22,317 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-10-27 15:36:22,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:36:22,318 INFO L225 Difference]: With dead ends: 49 [2018-10-27 15:36:22,318 INFO L226 Difference]: Without dead ends: 37 [2018-10-27 15:36:22,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-27 15:36:22,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-27 15:36:22,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-10-27 15:36:22,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-27 15:36:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-27 15:36:22,328 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2018-10-27 15:36:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:36:22,328 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-27 15:36:22,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 15:36:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-27 15:36:22,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-27 15:36:22,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-27 15:36:22,330 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-27 15:36:22,330 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-27 15:36:22,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-27 15:36:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1070919706, now seen corresponding path program 2 times [2018-10-27 15:36:22,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-27 15:36:22,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:22,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-27 15:36:22,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-27 15:36:22,332 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-27 15:36:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-27 15:36:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-27 15:36:22,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:36:22,441 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-27 15:36:22,441 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-27 15:36:22,442 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-27 15:36:22,442 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-27 15:36:22,442 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-27 15:36:22,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-27 15:36:22,453 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-27 15:36:22,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-27 15:36:22,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-27 15:36:22,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-27 15:36:24,715 WARN L854 $PredicateComparison]: unable to prove that (or (exists ((v_main_~x~0_BEFORE_CALL_1 Int)) (let ((.cse0 (mod v_main_~x~0_BEFORE_CALL_1 2))) (and (<= 268435455 (mod v_main_~x~0_BEFORE_CALL_1 4294967296)) (= .cse0 |c___VERIFIER_assert_#in~cond|) (= .cse0 0) (< (mod (+ v_main_~x~0_BEFORE_CALL_1 4294967295) 4294967296) 268435455) (<= .cse0 2147483647)))) (exists ((v_prenex_5 Int)) (let ((.cse3 (mod v_prenex_5 2))) (let ((.cse1 (mod (+ .cse3 4294967294) 4294967296)) (.cse2 (mod v_prenex_5 4294967296))) (and (<= .cse1 2147483647) (<= 268435455 .cse2) (= |c___VERIFIER_assert_#in~cond| .cse1) (< .cse2 0) (< (mod (+ v_prenex_5 4294967295) 4294967296) 268435455) (not (= .cse3 0)))))) (exists ((v_prenex_4 Int)) (let ((.cse5 (mod v_prenex_4 4294967296)) (.cse4 (mod v_prenex_4 2))) (and (< 2147483647 .cse4) (<= 0 .cse5) (<= 268435455 .cse5) (= (+ |c___VERIFIER_assert_#in~cond| 4294967296) .cse4) (< (mod (+ v_prenex_4 4294967295) 4294967296) 268435455)))) (exists ((v_prenex_3 Int)) (let ((.cse8 (mod v_prenex_3 2))) (let ((.cse7 (mod v_prenex_3 4294967296)) (.cse6 (mod (+ .cse8 4294967294) 4294967296))) (and (= (+ |c___VERIFIER_assert_#in~cond| 4294967296) .cse6) (<= 268435455 .cse7) (< .cse7 0) (< 2147483647 .cse6) (< (mod (+ v_prenex_3 4294967295) 4294967296) 268435455) (not (= .cse8 0)))))) (exists ((v_prenex_1 Int)) (let ((.cse9 (mod v_prenex_1 2))) (and (<= 268435455 (mod v_prenex_1 4294967296)) (< 2147483647 .cse9) (= .cse9 0) (< (mod (+ v_prenex_1 4294967295) 4294967296) 268435455) (= (+ |c___VERIFIER_assert_#in~cond| 4294967296) .cse9)))) (exists ((v_prenex_2 Int)) (let ((.cse10 (mod v_prenex_2 4294967296)) (.cse11 (mod v_prenex_2 2))) (and (<= 0 .cse10) (< (mod (+ v_prenex_2 4294967295) 4294967296) 268435455) (<= .cse11 2147483647) (<= 268435455 .cse10) (= .cse11 |c___VERIFIER_assert_#in~cond|))))) is different from true [2018-10-27 15:36:37,025 WARN L179 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 90 DAG size of output: 19 [2018-10-27 15:36:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 15:36:37,050 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-27 15:36:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-27 15:36:49,538 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-27 15:36:49,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [5] total 15 [2018-10-27 15:36:49,539 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-27 15:36:49,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-27 15:36:49,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-27 15:36:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=143, Unknown=10, NotChecked=24, Total=210 [2018-10-27 15:36:49,540 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2018-10-27 15:36:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-27 15:36:55,633 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2018-10-27 15:36:55,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-27 15:36:55,634 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2018-10-27 15:36:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-27 15:36:55,635 INFO L225 Difference]: With dead ends: 30 [2018-10-27 15:36:55,635 INFO L226 Difference]: Without dead ends: 0 [2018-10-27 15:36:55,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=38, Invalid=164, Unknown=12, NotChecked=26, Total=240 [2018-10-27 15:36:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-27 15:36:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-27 15:36:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-27 15:36:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-27 15:36:55,637 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2018-10-27 15:36:55,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-27 15:36:55,637 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-27 15:36:55,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-27 15:36:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-27 15:36:55,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-27 15:36:55,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-27 15:36:55,830 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-27 15:36:55,830 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-27 15:36:55,831 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-27 15:36:55,831 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-27 15:36:55,831 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-27 15:36:55,831 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-27 15:36:55,831 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 8 19) no Hoare annotation was computed. [2018-10-27 15:36:55,831 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 8 19) no Hoare annotation was computed. [2018-10-27 15:36:55,832 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 15) no Hoare annotation was computed. [2018-10-27 15:36:55,832 INFO L425 ceAbstractionStarter]: For program point L11-1(lines 11 17) no Hoare annotation was computed. [2018-10-27 15:36:55,832 INFO L421 ceAbstractionStarter]: At program point L13-3(lines 13 15) the Hoare annotation is: (or (= main_~x~0 0) (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (< (mod main_~x~0 4294967296) 268435455))) [2018-10-27 15:36:55,832 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2018-10-27 15:36:55,832 INFO L421 ceAbstractionStarter]: At program point L11-3(lines 11 17) the Hoare annotation is: (or (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (and (<= 0 main_~y~0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0))) [2018-10-27 15:36:55,833 INFO L421 ceAbstractionStarter]: At program point L11-4(lines 11 17) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (<= 268435455 (mod main_~x~0 4294967296))) [2018-10-27 15:36:55,833 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 8 19) the Hoare annotation is: true [2018-10-27 15:36:55,833 INFO L425 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-10-27 15:36:55,833 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-10-27 15:36:55,833 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-10-27 15:36:55,833 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-10-27 15:36:55,834 INFO L425 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-10-27 15:36:55,834 INFO L425 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-10-27 15:36:55,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 03:36:55 BoogieIcfgContainer [2018-10-27 15:36:55,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-27 15:36:55,847 INFO L168 Benchmark]: Toolchain (without parser) took 36437.46 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -585.2 MB). Peak memory consumption was 144.6 MB. Max. memory is 7.1 GB. [2018-10-27 15:36:55,848 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:36:55,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-27 15:36:55,850 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:36:55,850 INFO L168 Benchmark]: Boogie Preprocessor took 26.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-27 15:36:55,851 INFO L168 Benchmark]: RCFGBuilder took 325.44 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -780.1 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2018-10-27 15:36:55,852 INFO L168 Benchmark]: TraceAbstraction took 35817.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 184.3 MB). Peak memory consumption was 184.3 MB. Max. memory is 7.1 GB. [2018-10-27 15:36:55,857 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.03 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.06 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 325.44 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 729.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -780.1 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 35817.47 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 184.3 MB). Peak memory consumption was 184.3 MB. Max. memory is 7.1 GB. * 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 Derived loop invariant: (x + 4294967295) % 4294967296 < 268435455 || (((0 <= y && x <= 0) && 0 <= x) && y <= 0) - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: x == 0 || ((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 35.7s OverallTime, 5 OverallIterations, 6 TraceHistogramMax, 6.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 83 SDtfs, 20 SDslu, 106 SDs, 0 SdLazy, 62 SolverSat, 8 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 29.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=4, 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, 5 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 12 PreInvPairs, 22 NumberOfFragments, 56 HoareAnnotationTreeSize, 12 FomulaSimplifications, 106 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 462 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 28.0s InterpolantComputationTime, 131 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 169 ConstructedInterpolants, 2 QuantifiedInterpolants, 18561 SizeOfPredicates, 5 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 111/125 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...