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/loop-lit/afnp2014_true-unreach-call_true-termination.c.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 22:13:33,659 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 22:13:33,661 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 22:13:33,677 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 22:13:33,677 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 22:13:33,678 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 22:13:33,680 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 22:13:33,683 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 22:13:33,691 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 22:13:33,692 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 22:13:33,692 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 22:13:33,696 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 22:13:33,697 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 22:13:33,701 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 22:13:33,702 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 22:13:33,702 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 22:13:33,705 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 22:13:33,707 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 22:13:33,708 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 22:13:33,710 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 22:13:33,711 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 22:13:33,712 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 22:13:33,714 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 22:13:33,714 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 22:13:33,714 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 22:13:33,715 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 22:13:33,716 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 22:13:33,717 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 22:13:33,720 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 22:13:33,721 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 22:13:33,722 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 22:13:33,722 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-11-07 22:13:33,726 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 [2018-11-07 22:13:33,752 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 22:13:33,753 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 22:13:33,754 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 22:13:33,754 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 22:13:33,754 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 22:13:33,754 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 22:13:33,754 INFO L133 SettingsManager]: * Maximum recursion depth of evaluation operations=6 [2018-11-07 22:13:33,754 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 22:13:33,755 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 22:13:33,755 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 22:13:33,755 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 22:13:33,756 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 22:13:33,756 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 22:13:33,757 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 22:13:33,757 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 22:13:33,757 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 22:13:33,757 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 22:13:33,757 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 22:13:33,757 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 22:13:33,758 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 22:13:33,759 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 22:13:33,759 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 22:13:33,759 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 22:13:33,759 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 22:13:33,759 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 22:13:33,760 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 22:13:33,760 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 22:13:33,760 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 22:13:33,761 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 22:13:33,761 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 22:13:33,761 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 22:13:33,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 22:13:33,761 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 22:13:33,762 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 22:13:33,762 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 22:13:33,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 22:13:33,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 22:13:33,835 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 22:13:33,837 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 22:13:33,837 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 22:13:33,838 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-11-07 22:13:33,895 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b924bacd2/8a44122d8a114e0799b2b76aab321510/FLAGf6c496f7a [2018-11-07 22:13:34,347 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 22:13:34,347 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014_true-unreach-call_true-termination.c.i [2018-11-07 22:13:34,356 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b924bacd2/8a44122d8a114e0799b2b76aab321510/FLAGf6c496f7a [2018-11-07 22:13:34,379 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b924bacd2/8a44122d8a114e0799b2b76aab321510 [2018-11-07 22:13:34,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 22:13:34,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 22:13:34,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 22:13:34,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 22:13:34,402 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 22:13:34,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e926fb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34, skipping insertion in model container [2018-11-07 22:13:34,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 22:13:34,440 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 22:13:34,682 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 22:13:34,687 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 22:13:34,703 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 22:13:34,717 INFO L193 MainTranslator]: Completed translation [2018-11-07 22:13:34,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34 WrapperNode [2018-11-07 22:13:34,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 22:13:34,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 22:13:34,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 22:13:34,718 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 22:13:34,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 22:13:34,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 22:13:34,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 22:13:34,742 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 22:13:34,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (1/1) ... [2018-11-07 22:13:34,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 22:13:34,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 22:13:34,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 22:13:34,772 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 22:13:34,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (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 [2018-11-07 22:13:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 22:13:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 22:13:34,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 22:13:34,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 22:13:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 22:13:34,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 22:13:34,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-07 22:13:34,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-07 22:13:35,114 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 22:13:35,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:13:35 BoogieIcfgContainer [2018-11-07 22:13:35,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 22:13:35,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 22:13:35,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 22:13:35,119 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 22:13:35,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 10:13:34" (1/3) ... [2018-11-07 22:13:35,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb9571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:13:35, skipping insertion in model container [2018-11-07 22:13:35,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 10:13:34" (2/3) ... [2018-11-07 22:13:35,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb9571 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 10:13:35, skipping insertion in model container [2018-11-07 22:13:35,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 10:13:35" (3/3) ... [2018-11-07 22:13:35,124 INFO L112 eAbstractionObserver]: Analyzing ICFG afnp2014_true-unreach-call_true-termination.c.i [2018-11-07 22:13:35,134 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 22:13:35,143 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 22:13:35,181 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 22:13:35,274 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 22:13:35,275 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 22:13:35,275 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 22:13:35,275 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 22:13:35,275 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 22:13:35,276 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 22:13:35,279 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 22:13:35,279 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 22:13:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-11-07 22:13:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-07 22:13:35,314 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:13:35,315 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:13:35,317 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:13:35,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:13:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2008095039, now seen corresponding path program 1 times [2018-11-07 22:13:35,336 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:13:35,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:35,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:13:35,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:35,388 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:13:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:13:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:35,445 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 22:13:35,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-07 22:13:35,445 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:13:35,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-07 22:13:35,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-07 22:13:35,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 22:13:35,465 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2018-11-07 22:13:35,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:13:35,488 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2018-11-07 22:13:35,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 22:13:35,490 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-07 22:13:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:13:35,499 INFO L225 Difference]: With dead ends: 33 [2018-11-07 22:13:35,499 INFO L226 Difference]: Without dead ends: 14 [2018-11-07 22:13:35,503 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 [2018-11-07 22:13:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-07 22:13:35,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-07 22:13:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-07 22:13:35,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-07 22:13:35,541 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-07 22:13:35,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:13:35,542 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-07 22:13:35,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-07 22:13:35,542 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-07 22:13:35,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-07 22:13:35,543 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:13:35,544 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:13:35,544 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:13:35,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:13:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1404763780, now seen corresponding path program 1 times [2018-11-07 22:13:35,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:13:35,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:35,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:13:35,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:35,547 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:13:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:13:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:35,678 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 22:13:35,679 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 22:13:35,679 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 22:13:35,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 22:13:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 22:13:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 22:13:35,682 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-11-07 22:13:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:13:35,795 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2018-11-07 22:13:35,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 22:13:35,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-07 22:13:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:13:35,797 INFO L225 Difference]: With dead ends: 23 [2018-11-07 22:13:35,798 INFO L226 Difference]: Without dead ends: 18 [2018-11-07 22:13:35,799 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 [2018-11-07 22:13:35,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-07 22:13:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-07 22:13:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-07 22:13:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-11-07 22:13:35,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2018-11-07 22:13:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:13:35,805 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-11-07 22:13:35,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 22:13:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-11-07 22:13:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-07 22:13:35,806 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:13:35,806 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:13:35,807 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:13:35,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:13:35,807 INFO L82 PathProgramCache]: Analyzing trace with hash 108470830, now seen corresponding path program 1 times [2018-11-07 22:13:35,807 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:13:35,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:35,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:13:35,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:35,809 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:13:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:13:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:35,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:13:35,939 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:13:35,940 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2018-11-07 22:13:35,942 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [10], [13], [19], [21], [28], [31], [33], [39], [40], [41], [43] [2018-11-07 22:13:35,977 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 22:13:35,977 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 22:13:36,294 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 22:13:36,298 INFO L272 AbstractInterpreter]: Visited 14 different actions 77 times. Merged at 5 different actions 35 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 4 variables. [2018-11-07 22:13:36,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:13:36,315 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 22:13:36,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:13:36,316 INFO L194 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 [2018-11-07 22:13:36,327 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:13:36,328 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 22:13:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:13:36,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:13:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:36,428 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:13:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:36,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 22:13:36,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2018-11-07 22:13:36,727 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 22:13:36,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-07 22:13:36,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-07 22:13:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-07 22:13:36,730 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2018-11-07 22:13:36,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:13:36,886 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-11-07 22:13:36,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-07 22:13:36,886 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-07 22:13:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:13:36,887 INFO L225 Difference]: With dead ends: 27 [2018-11-07 22:13:36,887 INFO L226 Difference]: Without dead ends: 22 [2018-11-07 22:13:36,888 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-07 22:13:36,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-11-07 22:13:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-11-07 22:13:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-07 22:13:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2018-11-07 22:13:36,893 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2018-11-07 22:13:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:13:36,894 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-11-07 22:13:36,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-07 22:13:36,894 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2018-11-07 22:13:36,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-11-07 22:13:36,895 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:13:36,895 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:13:36,895 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:13:36,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:13:36,896 INFO L82 PathProgramCache]: Analyzing trace with hash -238722856, now seen corresponding path program 2 times [2018-11-07 22:13:36,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:13:36,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:36,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 22:13:36,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:36,898 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:13:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:13:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:37,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:13:37,079 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:13:37,079 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 22:13:37,080 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 22:13:37,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:13:37,080 INFO L194 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 [2018-11-07 22:13:37,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 22:13:37,096 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 22:13:37,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-07 22:13:37,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 22:13:37,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:13:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:37,400 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:13:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:37,458 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 22:13:37,459 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2018-11-07 22:13:37,459 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 22:13:37,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-07 22:13:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-07 22:13:37,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-11-07 22:13:37,460 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 10 states. [2018-11-07 22:13:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:13:37,934 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-11-07 22:13:37,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-07 22:13:37,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2018-11-07 22:13:37,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:13:37,937 INFO L225 Difference]: With dead ends: 46 [2018-11-07 22:13:37,937 INFO L226 Difference]: Without dead ends: 38 [2018-11-07 22:13:37,938 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2018-11-07 22:13:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-11-07 22:13:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-11-07 22:13:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-11-07 22:13:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2018-11-07 22:13:37,947 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 21 [2018-11-07 22:13:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:13:37,947 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2018-11-07 22:13:37,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-07 22:13:37,948 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2018-11-07 22:13:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-07 22:13:37,949 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 22:13:37,949 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 22:13:37,949 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 22:13:37,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 22:13:37,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2021299840, now seen corresponding path program 3 times [2018-11-07 22:13:37,950 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 22:13:37,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:37,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 22:13:37,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 22:13:37,951 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 22:13:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 22:13:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:38,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:13:38,159 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 22:13:38,159 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 22:13:38,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 22:13:38,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 22:13:38,160 INFO L194 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 [2018-11-07 22:13:38,175 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-07 22:13:38,175 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-07 22:13:38,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-07 22:13:38,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 22:13:38,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 22:13:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:38,496 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 22:13:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 22:13:39,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 22:13:39,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2018-11-07 22:13:39,333 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 22:13:39,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-07 22:13:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-07 22:13:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2018-11-07 22:13:39,336 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 16 states. [2018-11-07 22:13:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 22:13:39,535 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2018-11-07 22:13:39,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 22:13:39,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-11-07 22:13:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 22:13:39,537 INFO L225 Difference]: With dead ends: 38 [2018-11-07 22:13:39,537 INFO L226 Difference]: Without dead ends: 0 [2018-11-07 22:13:39,539 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2018-11-07 22:13:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-07 22:13:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-07 22:13:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-07 22:13:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-07 22:13:39,540 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-11-07 22:13:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 22:13:39,540 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-07 22:13:39,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-07 22:13:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-07 22:13:39,541 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-07 22:13:39,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-07 22:13:39,740 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 17 [2018-11-07 22:13:39,744 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-07 22:13:39,745 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-07 22:13:39,745 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-07 22:13:39,745 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-07 22:13:39,745 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-07 22:13:39,745 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-07 22:13:39,745 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 19) the Hoare annotation is: true [2018-11-07 22:13:39,745 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 19) no Hoare annotation was computed. [2018-11-07 22:13:39,746 INFO L425 ceAbstractionStarter]: For program point L17(line 17) no Hoare annotation was computed. [2018-11-07 22:13:39,746 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 19) no Hoare annotation was computed. [2018-11-07 22:13:39,746 INFO L425 ceAbstractionStarter]: For program point L13-1(lines 13 16) no Hoare annotation was computed. [2018-11-07 22:13:39,746 INFO L425 ceAbstractionStarter]: For program point L13-2(line 13) no Hoare annotation was computed. [2018-11-07 22:13:39,746 INFO L425 ceAbstractionStarter]: For program point L13-4(lines 13 16) no Hoare annotation was computed. [2018-11-07 22:13:39,746 INFO L421 ceAbstractionStarter]: At program point L13-6(lines 13 16) the Hoare annotation is: (or (and (= main_~x~0 1) (<= 0 main_~y~0) (<= (+ main_~y~0 1) main_~x~0)) (and (<= main_~y~0 main_~x~0) (<= 3 main_~y~0)) (and (<= 1 main_~x~0) (= main_~y~0 main_~x~0))) [2018-11-07 22:13:39,747 INFO L421 ceAbstractionStarter]: At program point L13-7(lines 13 16) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2018-11-07 22:13:39,747 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-11-07 22:13:39,747 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-11-07 22:13:39,747 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-11-07 22:13:39,747 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-11-07 22:13:39,747 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-11-07 22:13:39,747 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-11-07 22:13:39,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 10:13:39 BoogieIcfgContainer [2018-11-07 22:13:39,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 22:13:39,759 INFO L168 Benchmark]: Toolchain (without parser) took 5364.60 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 726.1 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -536.4 MB). Peak memory consumption was 189.8 MB. Max. memory is 7.1 GB. [2018-11-07 22:13:39,762 INFO L168 Benchmark]: CDTParser took 0.26 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. [2018-11-07 22:13:39,762 INFO L168 Benchmark]: CACSL2BoogieTranslator took 320.52 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. [2018-11-07 22:13:39,763 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.94 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. [2018-11-07 22:13:39,764 INFO L168 Benchmark]: Boogie Preprocessor took 30.34 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. [2018-11-07 22:13:39,764 INFO L168 Benchmark]: RCFGBuilder took 342.94 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 726.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -783.6 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. [2018-11-07 22:13:39,765 INFO L168 Benchmark]: TraceAbstraction took 4642.89 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 236.7 MB). Peak memory consumption was 236.7 MB. Max. memory is 7.1 GB. [2018-11-07 22:13:39,771 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 320.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.94 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 30.34 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 342.94 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 726.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -783.6 MB). Peak memory consumption was 26.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4642.89 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 236.7 MB). Peak memory consumption was 236.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: (((x == 1 && 0 <= y) && y + 1 <= x) || (y <= x && 3 <= y)) || (1 <= x && y == x) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. SAFE Result, 4.5s OverallTime, 5 OverallIterations, 7 TraceHistogramMax, 1.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 89 SDtfs, 43 SDslu, 338 SDs, 0 SdLazy, 173 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 14 PreInvPairs, 26 NumberOfFragments, 35 HoareAnnotationTreeSize, 14 FomulaSimplifications, 16 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 97 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 173 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 237 ConstructedInterpolants, 12 QuantifiedInterpolants, 30961 SizeOfPredicates, 9 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 40/300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...