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-EXP.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:29:07,566 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:29:07,568 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:29:07,580 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:29:07,580 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:29:07,581 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:29:07,582 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:29:07,584 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:29:07,586 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:29:07,587 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:29:07,588 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:29:07,588 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:29:07,589 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:29:07,590 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:29:07,591 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:29:07,592 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:29:07,593 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:29:07,595 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:29:07,597 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:29:07,598 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:29:07,599 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:29:07,601 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:29:07,603 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 12:29:07,604 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 12:29:07,604 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 12:29:07,605 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 12:29:07,606 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 12:29:07,607 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 12:29:07,607 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 12:29:07,609 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 12:29:07,609 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 12:29:07,610 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 12:29:07,612 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:29:07,628 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:29:07,629 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:29:07,629 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:29:07,630 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:29:07,630 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:29:07,630 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:29:07,630 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:29:07,631 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:29:07,631 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:29:07,631 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:29:07,631 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:29:07,631 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:29:07,632 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:29:07,632 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:29:07,633 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:29:07,633 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:29:07,633 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:29:07,633 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:29:07,633 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:29:07,634 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:29:07,634 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:29:07,634 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:29:07,634 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:29:07,635 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:29:07,635 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:29:07,635 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:29:07,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:29:07,636 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:29:07,636 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:29:07,636 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:29:07,636 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:29:07,637 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:29:07,637 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:29:07,637 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:29:07,637 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:29:07,637 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:29:07,684 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:29:07,697 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:29:07,700 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:29:07,702 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:29:07,702 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:29:07,703 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-10-24 12:29:07,762 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/db150f984/b9723f0298874be490d95076eb245d96/FLAG0f3e829bb [2018-10-24 12:29:08,212 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:29:08,213 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_false-unreach-call2_true-termination.i [2018-10-24 12:29:08,221 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/db150f984/b9723f0298874be490d95076eb245d96/FLAG0f3e829bb [2018-10-24 12:29:08,239 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/db150f984/b9723f0298874be490d95076eb245d96 [2018-10-24 12:29:08,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:29:08,250 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:29:08,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:29:08,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:29:08,260 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:29:08,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e44861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08, skipping insertion in model container [2018-10-24 12:29:08,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:29:08,302 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:29:08,491 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:29:08,495 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:29:08,513 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:29:08,531 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:29:08,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08 WrapperNode [2018-10-24 12:29:08,532 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:29:08,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:29:08,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:29:08,533 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:29:08,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,551 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:29:08,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:29:08,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:29:08,551 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:29:08,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (1/1) ... [2018-10-24 12:29:08,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:29:08,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:29:08,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:29:08,569 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:29:08,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (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 [2018-10-24 12:29:08,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:29:08,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:29:08,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:29:08,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:29:08,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:29:08,628 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:29:08,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:29:08,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:29:08,864 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:29:08,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:08 BoogieIcfgContainer [2018-10-24 12:29:08,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:29:08,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:29:08,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:29:08,869 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:29:08,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:29:08" (1/3) ... [2018-10-24 12:29:08,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7af7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:08, skipping insertion in model container [2018-10-24 12:29:08,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:29:08" (2/3) ... [2018-10-24 12:29:08,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7af7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:29:08, skipping insertion in model container [2018-10-24 12:29:08,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:29:08" (3/3) ... [2018-10-24 12:29:08,873 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_false-unreach-call2_true-termination.i [2018-10-24 12:29:08,882 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:29:08,890 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:29:08,907 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:29:08,939 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:29:08,940 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:29:08,940 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:29:08,940 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:29:08,940 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:29:08,940 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:29:08,941 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:29:08,941 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:29:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-24 12:29:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-24 12:29:08,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:08,965 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:08,968 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:08,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2018-10-24 12:29:08,977 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:09,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:09,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:09,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:09,026 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:09,079 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:29:09,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:29:09,080 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:29:09,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:29:09,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:29:09,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:29:09,100 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-24 12:29:09,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:09,122 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-24 12:29:09,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:29:09,126 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-24 12:29:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:09,135 INFO L225 Difference]: With dead ends: 29 [2018-10-24 12:29:09,136 INFO L226 Difference]: Without dead ends: 12 [2018-10-24 12:29:09,141 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 [2018-10-24 12:29:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-24 12:29:09,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-24 12:29:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-24 12:29:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-24 12:29:09,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-24 12:29:09,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:09,179 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-24 12:29:09,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:29:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-24 12:29:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 12:29:09,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:09,180 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:09,181 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:09,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:09,182 INFO L82 PathProgramCache]: Analyzing trace with hash -571410792, now seen corresponding path program 1 times [2018-10-24 12:29:09,182 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:09,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:09,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:09,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:09,184 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:09,287 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:29:09,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 12:29:09,287 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:29:09,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:29:09,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:29:09,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:29:09,294 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-24 12:29:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:09,323 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-24 12:29:09,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:29:09,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-24 12:29:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:09,325 INFO L225 Difference]: With dead ends: 19 [2018-10-24 12:29:09,325 INFO L226 Difference]: Without dead ends: 14 [2018-10-24 12:29:09,326 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 [2018-10-24 12:29:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-24 12:29:09,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-24 12:29:09,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-24 12:29:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-24 12:29:09,331 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-24 12:29:09,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:09,332 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-24 12:29:09,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:29:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-24 12:29:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-24 12:29:09,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:09,333 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:09,333 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:09,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1625028318, now seen corresponding path program 1 times [2018-10-24 12:29:09,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:09,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:09,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:09,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:09,336 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:09,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:09,554 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:29:09,555 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-24 12:29:09,557 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [20], [23], [25], [31], [32], [33], [35] [2018-10-24 12:29:09,585 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:29:09,585 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:29:09,788 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:29:09,789 INFO L272 AbstractInterpreter]: Visited 12 different actions 18 times. Merged at 2 different actions 4 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-10-24 12:29:09,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:09,835 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:29:09,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:09,836 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 [2018-10-24 12:29:09,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:09,853 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:29:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:09,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:29:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:09,941 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:29:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:10,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:29:10,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 8 [2018-10-24 12:29:10,181 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:29:10,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-24 12:29:10,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-24 12:29:10,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:29:10,183 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2018-10-24 12:29:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:10,235 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-24 12:29:10,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 12:29:10,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-24 12:29:10,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:10,237 INFO L225 Difference]: With dead ends: 21 [2018-10-24 12:29:10,237 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 12:29:10,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-24 12:29:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 12:29:10,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-24 12:29:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 12:29:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-24 12:29:10,242 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-24 12:29:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:10,242 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-24 12:29:10,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-24 12:29:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-24 12:29:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 12:29:10,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:10,244 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:10,244 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:10,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:10,245 INFO L82 PathProgramCache]: Analyzing trace with hash -720896604, now seen corresponding path program 2 times [2018-10-24 12:29:10,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:10,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:10,246 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:10,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:10,246 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:10,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:10,404 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:29:10,405 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:29:10,405 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:29:10,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:10,405 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 [2018-10-24 12:29:10,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:29:10,415 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:29:10,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:29:10,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:29:10,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:29:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:10,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:29:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:10,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:29:10,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 10 [2018-10-24 12:29:10,756 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:29:10,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:29:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:29:10,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:29:10,758 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-10-24 12:29:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:10,799 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-24 12:29:10,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:29:10,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-24 12:29:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:10,803 INFO L225 Difference]: With dead ends: 23 [2018-10-24 12:29:10,803 INFO L226 Difference]: Without dead ends: 18 [2018-10-24 12:29:10,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-24 12:29:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-24 12:29:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-24 12:29:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 12:29:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-24 12:29:10,808 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-24 12:29:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:10,808 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-24 12:29:10,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:29:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-24 12:29:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 12:29:10,809 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:10,810 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:10,810 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:10,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:10,810 INFO L82 PathProgramCache]: Analyzing trace with hash -296916246, now seen corresponding path program 3 times [2018-10-24 12:29:10,811 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:10,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:10,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:29:10,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:10,812 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:10,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:11,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:11,034 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:29:11,034 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:29:11,034 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:29:11,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:11,034 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:29:11,045 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:29:11,046 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:29:11,058 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:29:11,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:29:11,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:29:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:11,074 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:29:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:11,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:29:11,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 12 [2018-10-24 12:29:11,453 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:29:11,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:29:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:29:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-10-24 12:29:11,455 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 6 states. [2018-10-24 12:29:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:11,684 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-24 12:29:11,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 12:29:11,686 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-10-24 12:29:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:11,686 INFO L225 Difference]: With dead ends: 25 [2018-10-24 12:29:11,686 INFO L226 Difference]: Without dead ends: 20 [2018-10-24 12:29:11,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-10-24 12:29:11,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-24 12:29:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-24 12:29:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-24 12:29:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-24 12:29:11,691 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-24 12:29:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:11,692 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-24 12:29:11,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:29:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-24 12:29:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-24 12:29:11,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:11,693 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:11,693 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:11,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash -873685328, now seen corresponding path program 4 times [2018-10-24 12:29:11,694 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:11,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:11,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:29:11,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:11,695 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:11,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:11,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:11,815 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:29:11,816 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:29:11,816 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:29:11,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:11,816 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 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 [2018-10-24 12:29:11,831 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:11,831 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:29:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:11,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:29:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:11,882 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:29:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:12,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:29:12,091 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 14 [2018-10-24 12:29:12,092 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:29:12,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 12:29:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 12:29:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:29:12,093 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2018-10-24 12:29:12,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:12,170 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-24 12:29:12,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 12:29:12,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-10-24 12:29:12,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:12,172 INFO L225 Difference]: With dead ends: 27 [2018-10-24 12:29:12,172 INFO L226 Difference]: Without dead ends: 22 [2018-10-24 12:29:12,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-10-24 12:29:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-24 12:29:12,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-24 12:29:12,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-24 12:29:12,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-24 12:29:12,177 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-24 12:29:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:12,178 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-24 12:29:12,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 12:29:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-24 12:29:12,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-24 12:29:12,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:12,179 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:12,179 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:12,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:12,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1097991946, now seen corresponding path program 5 times [2018-10-24 12:29:12,179 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:12,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:12,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:29:12,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:12,181 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:12,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:29:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:12,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:12,331 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:29:12,331 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:29:12,332 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:29:12,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:29:12,332 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:29:12,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:29:12,340 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:29:12,360 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-24 12:29:12,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:29:12,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:29:12,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:12,383 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:29:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:29:12,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:29:12,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 10] total 16 [2018-10-24 12:29:12,686 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:29:12,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 12:29:12,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 12:29:12,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-10-24 12:29:12,688 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 8 states. [2018-10-24 12:29:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:29:12,760 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-24 12:29:12,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 12:29:12,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2018-10-24 12:29:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:29:12,763 INFO L225 Difference]: With dead ends: 29 [2018-10-24 12:29:12,763 INFO L226 Difference]: Without dead ends: 24 [2018-10-24 12:29:12,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-10-24 12:29:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-24 12:29:12,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-24 12:29:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-24 12:29:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-24 12:29:12,768 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2018-10-24 12:29:12,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:29:12,769 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-24 12:29:12,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 12:29:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-24 12:29:12,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 12:29:12,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:29:12,770 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:29:12,770 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:29:12,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:29:12,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1908287044, now seen corresponding path program 6 times [2018-10-24 12:29:12,771 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:29:12,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:12,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:29:12,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:29:12,772 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:29:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 12:29:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-10-24 12:29:12,810 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-10-24 12:29:12,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:29:12 BoogieIcfgContainer [2018-10-24 12:29:12,837 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:29:12,837 INFO L168 Benchmark]: Toolchain (without parser) took 4588.13 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 720.4 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -528.9 MB). Peak memory consumption was 191.4 MB. Max. memory is 7.1 GB. [2018-10-24 12:29:12,840 INFO L168 Benchmark]: CDTParser took 0.20 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. [2018-10-24 12:29:12,840 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.09 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. [2018-10-24 12:29:12,841 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.08 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. [2018-10-24 12:29:12,842 INFO L168 Benchmark]: Boogie Preprocessor took 17.71 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. [2018-10-24 12:29:12,842 INFO L168 Benchmark]: RCFGBuilder took 296.35 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 720.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -770.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. [2018-10-24 12:29:12,843 INFO L168 Benchmark]: TraceAbstraction took 3970.54 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 230.5 MB). Peak memory consumption was 230.5 MB. Max. memory is 7.1 GB. [2018-10-24 12:29:12,847 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.09 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 18.08 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 17.71 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 296.35 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 720.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -770.0 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3970.54 ms. Allocated memory is still 2.2 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 230.5 MB). Peak memory consumption was 230.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L9] unsigned int x = 0; [L10] unsigned int y = 1; VAL [x=0, y=1] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=1, y=2] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=2, y=4] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=3, y=8] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=4, y=16] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=5, y=32] [L11] COND TRUE x < 6 [L12] x++ [L13] y *= 2 VAL [x=6, y=64] [L11] COND FALSE !(x < 6) VAL [x=6, y=64] [L15] CALL __VERIFIER_assert(x != 6) VAL [\old(cond)=0] [L3] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 18 locations, 1 error locations. UNSAFE Result, 3.9s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 0 SDslu, 239 SDs, 0 SdLazy, 133 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 134 SyntacticMatches, 21 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 214 NumberOfCodeBlocks, 214 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 259 ConstructedInterpolants, 0 QuantifiedInterpolants, 17741 SizeOfPredicates, 0 NumberOfNonLiveVariables, 215 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 0/210 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...