java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-63daa26 [2018-11-12 20:27:27,652 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-12 20:27:27,654 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-12 20:27:27,672 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-12 20:27:27,672 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-12 20:27:27,673 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-12 20:27:27,676 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-12 20:27:27,679 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-12 20:27:27,682 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-12 20:27:27,684 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-12 20:27:27,685 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-12 20:27:27,687 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-12 20:27:27,688 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-12 20:27:27,696 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-12 20:27:27,697 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-12 20:27:27,698 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-12 20:27:27,702 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-12 20:27:27,706 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-12 20:27:27,708 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-12 20:27:27,712 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-12 20:27:27,714 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-12 20:27:27,715 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-12 20:27:27,719 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-12 20:27:27,719 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-12 20:27:27,719 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-12 20:27:27,720 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-12 20:27:27,722 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-12 20:27:27,723 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-12 20:27:27,723 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-12 20:27:27,729 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-12 20:27:27,729 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-12 20:27:27,730 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-12 20:27:27,730 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-12 20:27:27,730 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-12 20:27:27,733 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-12 20:27:27,734 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-12 20:27:27,735 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT-LIM.epf [2018-11-12 20:27:27,761 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-12 20:27:27,762 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-12 20:27:27,763 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-12 20:27:27,763 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-12 20:27:27,763 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-12 20:27:27,764 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-12 20:27:27,764 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-12 20:27:27,764 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-12 20:27:27,764 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-12 20:27:27,765 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-12 20:27:27,765 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-12 20:27:27,765 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-12 20:27:27,765 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-12 20:27:27,766 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-12 20:27:27,766 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-12 20:27:27,766 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-12 20:27:27,766 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-12 20:27:27,768 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-12 20:27:27,768 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-12 20:27:27,768 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-12 20:27:27,768 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-12 20:27:27,769 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-12 20:27:27,769 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-12 20:27:27,769 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-12 20:27:27,769 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-12 20:27:27,769 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-12 20:27:27,770 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-12 20:27:27,770 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-12 20:27:27,770 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-12 20:27:27,771 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-12 20:27:27,771 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-12 20:27:27,771 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-12 20:27:27,771 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-12 20:27:27,771 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-12 20:27:27,772 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-12 20:27:27,828 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-12 20:27:27,841 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-12 20:27:27,845 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-12 20:27:27,847 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-12 20:27:27,847 INFO L276 PluginConnector]: CDTParser initialized [2018-11-12 20:27:27,848 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-11-12 20:27:27,917 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74de53425/6ee67cfc3b2a48d3aa09ddcf093cddc4/FLAG9d2d9ecbe [2018-11-12 20:27:28,413 INFO L298 CDTParser]: Found 1 translation units. [2018-11-12 20:27:28,414 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_false-unreach-call_true-termination.i [2018-11-12 20:27:28,419 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74de53425/6ee67cfc3b2a48d3aa09ddcf093cddc4/FLAG9d2d9ecbe [2018-11-12 20:27:28,434 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74de53425/6ee67cfc3b2a48d3aa09ddcf093cddc4 [2018-11-12 20:27:28,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-12 20:27:28,447 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-12 20:27:28,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-12 20:27:28,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-12 20:27:28,454 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-12 20:27:28,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36be1352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28, skipping insertion in model container [2018-11-12 20:27:28,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-12 20:27:28,494 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-12 20:27:28,705 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 20:27:28,709 INFO L189 MainTranslator]: Completed pre-run [2018-11-12 20:27:28,728 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-12 20:27:28,745 INFO L193 MainTranslator]: Completed translation [2018-11-12 20:27:28,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28 WrapperNode [2018-11-12 20:27:28,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-12 20:27:28,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-12 20:27:28,747 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-12 20:27:28,747 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-12 20:27:28,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-12 20:27:28,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-12 20:27:28,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-12 20:27:28,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-12 20:27:28,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... [2018-11-12 20:27:28,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-12 20:27:28,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-12 20:27:28,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-12 20:27:28,798 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-12 20:27:28,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 20:27:28,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-12 20:27:28,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-12 20:27:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-12 20:27:28,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-12 20:27:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-12 20:27:28,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-12 20:27:28,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-12 20:27:28,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-12 20:27:29,274 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-12 20:27:29,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:27:29 BoogieIcfgContainer [2018-11-12 20:27:29,276 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-12 20:27:29,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-12 20:27:29,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-12 20:27:29,280 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-12 20:27:29,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 08:27:28" (1/3) ... [2018-11-12 20:27:29,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffb9b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:27:29, skipping insertion in model container [2018-11-12 20:27:29,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 08:27:28" (2/3) ... [2018-11-12 20:27:29,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffb9b56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 08:27:29, skipping insertion in model container [2018-11-12 20:27:29,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 08:27:29" (3/3) ... [2018-11-12 20:27:29,285 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_false-unreach-call_true-termination.i [2018-11-12 20:27:29,301 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-12 20:27:29,311 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-12 20:27:29,331 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-12 20:27:29,373 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-12 20:27:29,373 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-12 20:27:29,373 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-12 20:27:29,373 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-12 20:27:29,374 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-12 20:27:29,374 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-12 20:27:29,374 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-12 20:27:29,374 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-12 20:27:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-12 20:27:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-12 20:27:29,407 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:29,408 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:29,412 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:29,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:29,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2007171518, now seen corresponding path program 1 times [2018-11-12 20:27:29,421 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:29,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:29,465 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:29,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:29,466 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:29,546 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 20:27:29,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-12 20:27:29,547 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 20:27:29,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-12 20:27:29,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-12 20:27:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-12 20:27:29,573 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-12 20:27:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:29,598 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-11-12 20:27:29,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-12 20:27:29,599 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-12 20:27:29,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:29,609 INFO L225 Difference]: With dead ends: 32 [2018-11-12 20:27:29,610 INFO L226 Difference]: Without dead ends: 15 [2018-11-12 20:27:29,613 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-12 20:27:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-12 20:27:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-12 20:27:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-12 20:27:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-12 20:27:29,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-11-12 20:27:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:29,649 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-12 20:27:29,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-12 20:27:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-12 20:27:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-12 20:27:29,651 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:29,651 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:29,651 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:29,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:29,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1715017247, now seen corresponding path program 1 times [2018-11-12 20:27:29,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:29,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:29,654 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:29,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:29,654 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:29,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-12 20:27:29,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-12 20:27:29,791 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-12 20:27:29,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-12 20:27:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-12 20:27:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-12 20:27:29,795 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-11-12 20:27:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:29,878 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-11-12 20:27:29,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-12 20:27:29,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-12 20:27:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:29,880 INFO L225 Difference]: With dead ends: 25 [2018-11-12 20:27:29,880 INFO L226 Difference]: Without dead ends: 20 [2018-11-12 20:27:29,881 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-12 20:27:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-11-12 20:27:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-11-12 20:27:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-11-12 20:27:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-11-12 20:27:29,887 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2018-11-12 20:27:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:29,888 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-11-12 20:27:29,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-12 20:27:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-11-12 20:27:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-12 20:27:29,889 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:29,889 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:29,889 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:29,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:29,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1428843034, now seen corresponding path program 1 times [2018-11-12 20:27:29,890 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:29,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:29,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:29,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:29,892 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:30,284 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2018-11-12 20:27:30,540 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 9 [2018-11-12 20:27:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:30,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:30,580 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 20:27:30,581 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2018-11-12 20:27:30,583 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-11-12 20:27:30,618 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 20:27:30,618 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 20:27:30,728 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 20:27:30,972 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 20:27:30,974 INFO L272 AbstractInterpreter]: Visited 15 different actions 84 times. Merged at 6 different actions 42 times. Widened at 1 different actions 3 times. Performed 221 root evaluator evaluations with a maximum evaluation depth of 6. Performed 221 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2018-11-12 20:27:30,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:30,990 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 20:27:30,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:30,991 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 20:27:31,003 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:31,003 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 20:27:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:31,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:27:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:31,461 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:27:31,813 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-11-12 20:27:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:32,207 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 20:27:32,207 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2018-11-12 20:27:32,208 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:27:32,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-12 20:27:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-12 20:27:32,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2018-11-12 20:27:32,210 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 14 states. [2018-11-12 20:27:32,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:32,637 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-11-12 20:27:32,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-12 20:27:32,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-11-12 20:27:32,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:32,642 INFO L225 Difference]: With dead ends: 45 [2018-11-12 20:27:32,642 INFO L226 Difference]: Without dead ends: 39 [2018-11-12 20:27:32,643 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2018-11-12 20:27:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-12 20:27:32,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-11-12 20:27:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-11-12 20:27:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2018-11-12 20:27:32,651 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 16 [2018-11-12 20:27:32,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:32,651 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2018-11-12 20:27:32,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-12 20:27:32,652 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2018-11-12 20:27:32,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-12 20:27:32,653 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:32,653 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:32,653 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:32,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:32,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1947322111, now seen corresponding path program 1 times [2018-11-12 20:27:32,654 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:32,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:32,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:32,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:32,656 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:32,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:32,717 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 20:27:32,717 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-11-12 20:27:32,717 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [22], [28], [31], [33], [39], [40], [41], [43] [2018-11-12 20:27:32,719 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-12 20:27:32,720 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-12 20:27:32,725 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-12 20:27:32,980 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-12 20:27:32,980 INFO L272 AbstractInterpreter]: Visited 16 different actions 131 times. Merged at 7 different actions 66 times. Widened at 1 different actions 6 times. Performed 359 root evaluator evaluations with a maximum evaluation depth of 6. Performed 359 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 7 fixpoints after 2 different actions. Largest state had 7 variables. [2018-11-12 20:27:33,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:33,018 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-12 20:27:33,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:33,019 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 20:27:33,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:33,028 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 20:27:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:33,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:27:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:33,165 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:27:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:33,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 20:27:33,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2018-11-12 20:27:33,239 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:27:33,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-12 20:27:33,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-12 20:27:33,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-11-12 20:27:33,241 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2018-11-12 20:27:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:33,318 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2018-11-12 20:27:33,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-12 20:27:33,321 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-11-12 20:27:33,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:33,322 INFO L225 Difference]: With dead ends: 42 [2018-11-12 20:27:33,322 INFO L226 Difference]: Without dead ends: 27 [2018-11-12 20:27:33,323 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2018-11-12 20:27:33,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-11-12 20:27:33,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-11-12 20:27:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-11-12 20:27:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-11-12 20:27:33,333 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2018-11-12 20:27:33,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:33,333 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-11-12 20:27:33,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-12 20:27:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-11-12 20:27:33,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-12 20:27:33,336 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:33,336 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:33,336 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:33,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:33,339 INFO L82 PathProgramCache]: Analyzing trace with hash 994455866, now seen corresponding path program 2 times [2018-11-12 20:27:33,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:33,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:33,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:33,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:33,340 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-12 20:27:33,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:33,716 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 20:27:33,716 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 20:27:33,716 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 20:27:33,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:33,717 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 20:27:33,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-12 20:27:33,726 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-12 20:27:33,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-12 20:27:33,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 20:27:33,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:27:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:34,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:27:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:34,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 20:27:34,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2018-11-12 20:27:34,725 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:27:34,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-11-12 20:27:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-11-12 20:27:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2018-11-12 20:27:34,731 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 19 states. [2018-11-12 20:27:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:35,547 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2018-11-12 20:27:35,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-11-12 20:27:35,548 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2018-11-12 20:27:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:35,549 INFO L225 Difference]: With dead ends: 50 [2018-11-12 20:27:35,549 INFO L226 Difference]: Without dead ends: 44 [2018-11-12 20:27:35,551 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=288, Invalid=1604, Unknown=0, NotChecked=0, Total=1892 [2018-11-12 20:27:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-11-12 20:27:35,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2018-11-12 20:27:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-12 20:27:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-11-12 20:27:35,563 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 26 [2018-11-12 20:27:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:35,564 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-11-12 20:27:35,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-11-12 20:27:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-11-12 20:27:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-12 20:27:35,566 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:35,566 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:35,566 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:35,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:35,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1674514236, now seen corresponding path program 2 times [2018-11-12 20:27:35,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:35,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:35,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 20:27:35,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:35,570 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:35,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:35,736 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 20:27:35,736 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 20:27:35,736 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 20:27:35,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:35,737 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 20:27:35,747 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-12 20:27:35,748 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-12 20:27:35,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-12 20:27:35,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 20:27:35,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:27:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:35,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:27:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:36,011 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 20:27:36,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2018-11-12 20:27:36,012 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:27:36,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-12 20:27:36,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-12 20:27:36,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-11-12 20:27:36,013 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2018-11-12 20:27:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:36,080 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-11-12 20:27:36,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-12 20:27:36,087 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 26 [2018-11-12 20:27:36,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:36,088 INFO L225 Difference]: With dead ends: 44 [2018-11-12 20:27:36,088 INFO L226 Difference]: Without dead ends: 34 [2018-11-12 20:27:36,089 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2018-11-12 20:27:36,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-11-12 20:27:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-11-12 20:27:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-12 20:27:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-11-12 20:27:36,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2018-11-12 20:27:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:36,101 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-11-12 20:27:36,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-12 20:27:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-11-12 20:27:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-12 20:27:36,103 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:36,103 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:36,103 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:36,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash 162653665, now seen corresponding path program 3 times [2018-11-12 20:27:36,104 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:36,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:36,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 20:27:36,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:36,107 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:36,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:36,245 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 20:27:36,245 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 20:27:36,245 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 20:27:36,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:36,245 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-12 20:27:36,255 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-12 20:27:36,256 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-12 20:27:36,275 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-12 20:27:36,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-12 20:27:36,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:27:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:36,403 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:27:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:36,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 20:27:36,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2018-11-12 20:27:36,503 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:27:36,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-12 20:27:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-12 20:27:36,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-11-12 20:27:36,504 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2018-11-12 20:27:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:36,620 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-11-12 20:27:36,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-12 20:27:36,621 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2018-11-12 20:27:36,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:36,622 INFO L225 Difference]: With dead ends: 49 [2018-11-12 20:27:36,622 INFO L226 Difference]: Without dead ends: 39 [2018-11-12 20:27:36,623 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2018-11-12 20:27:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-12 20:27:36,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-11-12 20:27:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-12 20:27:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-11-12 20:27:36,628 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2018-11-12 20:27:36,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:36,629 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-11-12 20:27:36,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-12 20:27:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-11-12 20:27:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-12 20:27:36,630 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:36,630 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:36,630 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:36,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash 129265244, now seen corresponding path program 4 times [2018-11-12 20:27:36,631 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:36,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-12 20:27:36,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:36,632 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:36,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:36,838 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-12 20:27:36,838 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-12 20:27:36,838 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-12 20:27:36,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-12 20:27:36,839 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-12 20:27:36,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:36,850 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-12 20:27:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-12 20:27:36,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-12 20:27:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:37,131 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-12 20:27:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-12 20:27:37,489 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-12 20:27:37,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2018-11-12 20:27:37,489 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-12 20:27:37,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-12 20:27:37,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-12 20:27:37,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-11-12 20:27:37,491 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-11-12 20:27:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-12 20:27:37,953 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-12 20:27:37,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-12 20:27:37,954 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2018-11-12 20:27:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-12 20:27:37,956 INFO L225 Difference]: With dead ends: 55 [2018-11-12 20:27:37,956 INFO L226 Difference]: Without dead ends: 45 [2018-11-12 20:27:37,957 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-11-12 20:27:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-12 20:27:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2018-11-12 20:27:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-12 20:27:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-11-12 20:27:37,965 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2018-11-12 20:27:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-12 20:27:37,965 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-11-12 20:27:37,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-12 20:27:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-11-12 20:27:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-12 20:27:37,967 INFO L367 BasicCegarLoop]: Found error trace [2018-11-12 20:27:37,967 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-12 20:27:37,967 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-12 20:27:37,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-12 20:27:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1609235137, now seen corresponding path program 5 times [2018-11-12 20:27:37,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-12 20:27:37,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:37,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-12 20:27:37,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-12 20:27:37,969 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-12 20:27:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-12 20:27:38,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-12 20:27:38,020 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-12 20:27:38,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 08:27:38 BoogieIcfgContainer [2018-11-12 20:27:38,056 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-12 20:27:38,057 INFO L168 Benchmark]: Toolchain (without parser) took 9611.52 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 792.7 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -259.7 MB). Peak memory consumption was 533.1 MB. Max. memory is 7.1 GB. [2018-11-12 20:27:38,058 INFO L168 Benchmark]: CDTParser took 0.21 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. [2018-11-12 20:27:38,059 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.39 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. [2018-11-12 20:27:38,060 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.12 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. [2018-11-12 20:27:38,060 INFO L168 Benchmark]: Boogie Preprocessor took 26.62 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. [2018-11-12 20:27:38,061 INFO L168 Benchmark]: RCFGBuilder took 477.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 792.7 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -846.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2018-11-12 20:27:38,062 INFO L168 Benchmark]: TraceAbstraction took 8779.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 575.8 MB). Peak memory consumption was 575.8 MB. Max. memory is 7.1 GB. [2018-11-12 20:27:38,066 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 296.39 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 24.12 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 26.62 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 477.91 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 792.7 MB). Free memory was 1.4 GB in the beginning and 2.3 GB in the end (delta: -846.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8779.38 ms. Allocated memory is still 2.3 GB. Free memory was 2.3 GB in the beginning and 1.7 GB in the end (delta: 575.8 MB). Peak memory consumption was 575.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=6, n=0] [L14] COND TRUE i