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.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:05:23,750 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:05:23,752 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:05:23,766 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:05:23,766 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:05:23,768 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:05:23,769 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:05:23,772 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:05:23,774 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:05:23,775 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:05:23,780 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:05:23,780 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:05:23,783 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:05:23,785 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:05:23,788 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:05:23,790 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:05:23,791 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:05:23,792 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:05:23,794 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:05:23,795 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:05:23,796 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:05:23,797 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:05:23,799 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 12:05:23,807 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-24 12:05:23,833 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:05:23,834 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:05:23,835 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:05:23,836 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:05:23,836 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:05:23,836 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:05:23,836 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:05:23,836 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:05:23,837 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:05:23,837 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:05:23,837 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:05:23,837 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:05:23,838 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:05:23,838 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:05:23,838 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:05:23,839 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:05:23,839 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:05:23,839 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:05:23,839 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:05:23,839 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:05:23,840 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:05:23,842 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:05:23,842 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:05:23,842 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:05:23,843 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:05:23,843 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:05:23,843 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:05:23,843 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:05:23,843 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:05:23,844 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:05:23,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:05:23,844 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:05:23,844 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:05:23,844 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:05:23,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:05:23,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:05:23,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:05:23,927 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:05:23,927 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:05:23,928 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-24 12:05:23,990 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/64d85bf45/f7d9ae55e67140b4b653a77ac2e74d3b/FLAG0d0f0bd29 [2018-10-24 12:05:24,468 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:05:24,469 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-24 12:05:24,475 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/64d85bf45/f7d9ae55e67140b4b653a77ac2e74d3b/FLAG0d0f0bd29 [2018-10-24 12:05:24,489 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/64d85bf45/f7d9ae55e67140b4b653a77ac2e74d3b [2018-10-24 12:05:24,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:05:24,501 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:05:24,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:05:24,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:05:24,506 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:05:24,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488033a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24, skipping insertion in model container [2018-10-24 12:05:24,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:05:24,544 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:05:24,763 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:05:24,776 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:05:24,797 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:05:24,815 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:05:24,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24 WrapperNode [2018-10-24 12:05:24,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:05:24,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:05:24,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:05:24,817 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:05:24,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:05:24,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:05:24,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:05:24,864 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:05:24,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (1/1) ... [2018-10-24 12:05:24,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:05:24,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:05:24,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:05:24,892 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:05:24,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (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 12:05:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:05:25,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:05:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2018-10-24 12:05:25,035 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2018-10-24 12:05:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:05:25,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:05:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:05:25,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:05:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:05:25,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:05:25,435 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:05:25,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:05:25 BoogieIcfgContainer [2018-10-24 12:05:25,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:05:25,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:05:25,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:05:25,441 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:05:25,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:05:24" (1/3) ... [2018-10-24 12:05:25,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb45ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:05:25, skipping insertion in model container [2018-10-24 12:05:25,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:24" (2/3) ... [2018-10-24 12:05:25,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fb45ade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:05:25, skipping insertion in model container [2018-10-24 12:05:25,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:05:25" (3/3) ... [2018-10-24 12:05:25,445 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch_true-unreach-call.i [2018-10-24 12:05:25,456 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:05:25,465 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:05:25,483 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:05:25,517 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:05:25,517 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:05:25,517 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:05:25,518 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:05:25,518 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:05:25,518 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:05:25,518 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:05:25,518 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:05:25,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-10-24 12:05:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 12:05:25,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:25,544 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:25,547 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:25,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:25,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1679407704, now seen corresponding path program 1 times [2018-10-24 12:05:25,556 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:25,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:25,604 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:25,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:25,605 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:25,766 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 12:05:25,769 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:05:25,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:05:25,769 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:05:25,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:05:25,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:05:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:05:25,791 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2018-10-24 12:05:25,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:25,816 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-10-24 12:05:25,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:05:25,817 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-10-24 12:05:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:25,833 INFO L225 Difference]: With dead ends: 44 [2018-10-24 12:05:25,833 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 12:05:25,840 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 12:05:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 12:05:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-24 12:05:25,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:05:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-24 12:05:25,891 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-10-24 12:05:25,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:25,893 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-24 12:05:25,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:05:25,893 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-24 12:05:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:05:25,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:25,896 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:25,896 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:25,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1597240285, now seen corresponding path program 1 times [2018-10-24 12:05:25,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:25,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:25,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:25,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:25,902 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:26,283 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 12:05:26,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:05:26,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 12:05:26,284 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:05:26,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:05:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:05:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:05:26,289 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-10-24 12:05:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:26,372 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-24 12:05:26,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 12:05:26,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-10-24 12:05:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:26,374 INFO L225 Difference]: With dead ends: 29 [2018-10-24 12:05:26,375 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 12:05:26,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 12:05:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 12:05:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-24 12:05:26,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:05:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-24 12:05:26,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-24 12:05:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:26,383 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-24 12:05:26,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:05:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-24 12:05:26,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:05:26,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:26,385 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:26,386 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:26,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:26,386 INFO L82 PathProgramCache]: Analyzing trace with hash 145570050, now seen corresponding path program 1 times [2018-10-24 12:05:26,387 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:26,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:26,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:26,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:26,389 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:26,796 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 12:05:26,796 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:05:26,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:05:26,797 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:05:26,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:05:26,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:05:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:05:26,798 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-24 12:05:26,975 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-10-24 12:05:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:27,048 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-24 12:05:27,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:05:27,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-24 12:05:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:27,051 INFO L225 Difference]: With dead ends: 34 [2018-10-24 12:05:27,052 INFO L226 Difference]: Without dead ends: 25 [2018-10-24 12:05:27,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:05:27,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-24 12:05:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-24 12:05:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-24 12:05:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-24 12:05:27,059 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-10-24 12:05:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:27,060 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-24 12:05:27,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:05:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-24 12:05:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-24 12:05:27,061 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:27,061 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:27,062 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:27,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:27,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1819847252, now seen corresponding path program 1 times [2018-10-24 12:05:27,062 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:27,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:27,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:27,064 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:27,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:27,516 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:27,518 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-24 12:05:27,521 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [11], [17], [19], [26], [27], [31], [33], [37], [40], [42], [48], [49], [50], [52], [53], [54] [2018-10-24 12:05:27,602 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:05:27,603 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:05:27,779 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 12:05:31,640 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:05:31,642 INFO L272 AbstractInterpreter]: Visited 21 different actions 269 times. Merged at 7 different actions 217 times. Widened at 1 different actions 27 times. Found 32 fixpoints after 2 different actions. Largest state had 29 variables. [2018-10-24 12:05:31,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:31,690 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:05:31,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:31,690 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 12:05:31,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:31,708 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:05:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:31,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:32,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:32,572 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-10-24 12:05:32,721 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 12:05:33,099 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 12:05:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:33,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:33,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2018-10-24 12:05:33,591 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:33,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 12:05:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 12:05:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2018-10-24 12:05:33,593 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-24 12:05:33,932 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-10-24 12:05:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:34,243 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-10-24 12:05:34,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 12:05:34,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-24 12:05:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:34,247 INFO L225 Difference]: With dead ends: 43 [2018-10-24 12:05:34,247 INFO L226 Difference]: Without dead ends: 34 [2018-10-24 12:05:34,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:05:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-24 12:05:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2018-10-24 12:05:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 12:05:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-24 12:05:34,255 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-10-24 12:05:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:34,256 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-24 12:05:34,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 12:05:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-24 12:05:34,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-24 12:05:34,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:34,257 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:34,258 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:34,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:34,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2082093034, now seen corresponding path program 1 times [2018-10-24 12:05:34,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:34,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:34,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:34,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:34,260 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:34,895 WARN L179 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 27 [2018-10-24 12:05:35,037 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-10-24 12:05:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:35,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:35,279 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:35,279 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-24 12:05:35,279 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [11], [13], [17], [19], [26], [27], [31], [33], [37], [40], [42], [48], [49], [50], [52], [53], [54] [2018-10-24 12:05:35,282 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:05:35,282 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:05:35,293 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 12:05:38,410 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:05:38,411 INFO L272 AbstractInterpreter]: Visited 22 different actions 329 times. Merged at 8 different actions 239 times. Widened at 1 different actions 28 times. Found 70 fixpoints after 4 different actions. Largest state had 29 variables. [2018-10-24 12:05:38,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:38,449 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:05:38,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:38,449 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 12:05:38,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:38,468 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:05:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:38,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:38,573 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2018-10-24 12:05:38,587 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:05:38,587 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:38,602 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:38,605 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 25 [2018-10-24 12:05:38,609 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:05:38,609 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:38,623 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:40,650 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:40,651 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:91, output treesize:17 [2018-10-24 12:05:41,205 WARN L179 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-10-24 12:05:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:41,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:41,949 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-10-24 12:05:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:42,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:42,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2018-10-24 12:05:42,850 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:42,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 12:05:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 12:05:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2018-10-24 12:05:42,852 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 16 states. [2018-10-24 12:05:43,868 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-10-24 12:05:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:44,268 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2018-10-24 12:05:44,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 12:05:44,270 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-10-24 12:05:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:44,273 INFO L225 Difference]: With dead ends: 55 [2018-10-24 12:05:44,273 INFO L226 Difference]: Without dead ends: 43 [2018-10-24 12:05:44,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2018-10-24 12:05:44,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-24 12:05:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2018-10-24 12:05:44,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 12:05:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-24 12:05:44,282 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-10-24 12:05:44,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:44,283 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-24 12:05:44,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 12:05:44,283 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-24 12:05:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 12:05:44,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:44,284 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:44,284 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:44,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:44,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1253110442, now seen corresponding path program 2 times [2018-10-24 12:05:44,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:44,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:44,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:44,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:44,286 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:44,810 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 8 [2018-10-24 12:05:45,007 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 12:05:45,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:45,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:45,008 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:05:45,009 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:05:45,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:45,009 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 12:05:45,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:05:45,018 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:05:45,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-10-24 12:05:45,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:05:45,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-24 12:05:45,197 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-24 12:05:45,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:45,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2018-10-24 12:05:45,591 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:45,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:05:45,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:05:45,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:05:45,593 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2018-10-24 12:05:46,570 WARN L179 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2018-10-24 12:05:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:50,852 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2018-10-24 12:05:50,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 12:05:50,853 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2018-10-24 12:05:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:50,855 INFO L225 Difference]: With dead ends: 52 [2018-10-24 12:05:50,855 INFO L226 Difference]: Without dead ends: 40 [2018-10-24 12:05:50,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2018-10-24 12:05:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-24 12:05:50,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2018-10-24 12:05:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 12:05:50,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-24 12:05:50,865 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 28 [2018-10-24 12:05:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:50,865 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-24 12:05:50,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:05:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-24 12:05:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 12:05:50,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:50,867 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:50,867 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:50,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1646137452, now seen corresponding path program 2 times [2018-10-24 12:05:50,867 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:50,868 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:05:50,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:50,868 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:51,671 WARN L179 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 24 [2018-10-24 12:05:52,012 WARN L179 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-10-24 12:05:52,370 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2018-10-24 12:05:53,034 WARN L179 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2018-10-24 12:05:55,543 WARN L179 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2018-10-24 12:05:55,552 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 12:05:55,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:55,553 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:55,553 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:05:55,553 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:05:55,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:55,554 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 12:05:55,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:05:55,569 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:05:55,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:05:55,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:05:55,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:55,647 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-10-24 12:05:55,666 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:05:55,667 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,765 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,794 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-10-24 12:05:55,797 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:05:55,797 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,809 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:57,844 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:57,845 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:05:58,024 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2018-10-24 12:05:58,481 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2018-10-24 12:05:58,697 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-10-24 12:05:59,039 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 12:05:59,040 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:59,258 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2018-10-24 12:06:00,772 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2018-10-24 12:06:00,809 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 12:06:00,831 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:06:00,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2018-10-24 12:06:00,832 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:06:00,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 12:06:00,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 12:06:00,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 12:06:00,835 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 22 states. [2018-10-24 12:06:01,192 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-24 12:06:01,387 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2018-10-24 12:06:02,143 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2018-10-24 12:06:02,376 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2018-10-24 12:06:02,682 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 70 [2018-10-24 12:06:02,973 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2018-10-24 12:06:03,496 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2018-10-24 12:06:03,724 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2018-10-24 12:06:04,150 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2018-10-24 12:06:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:06:04,216 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-24 12:06:04,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:06:04,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2018-10-24 12:06:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:06:04,218 INFO L225 Difference]: With dead ends: 59 [2018-10-24 12:06:04,218 INFO L226 Difference]: Without dead ends: 47 [2018-10-24 12:06:04,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 12:06:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-24 12:06:04,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2018-10-24 12:06:04,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-24 12:06:04,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-10-24 12:06:04,228 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2018-10-24 12:06:04,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:06:04,228 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-10-24 12:06:04,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 12:06:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-10-24 12:06:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 12:06:04,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:06:04,230 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:06:04,230 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:06:04,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:04,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1637712594, now seen corresponding path program 3 times [2018-10-24 12:06:04,231 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:06:04,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:04,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:06:04,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:04,232 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:06:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 12:06:04,306 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:06:04,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 12:06:04,307 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:06:04,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:06:04,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:06:04,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:06:04,308 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2018-10-24 12:06:04,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:06:04,381 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2018-10-24 12:06:04,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:06:04,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-10-24 12:06:04,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:06:04,383 INFO L225 Difference]: With dead ends: 56 [2018-10-24 12:06:04,383 INFO L226 Difference]: Without dead ends: 33 [2018-10-24 12:06:04,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:06:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-24 12:06:04,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-24 12:06:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-24 12:06:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-24 12:06:04,392 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 28 [2018-10-24 12:06:04,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:06:04,392 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-24 12:06:04,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:06:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-24 12:06:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 12:06:04,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:06:04,394 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:06:04,395 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:06:04,395 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:04,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1605254594, now seen corresponding path program 4 times [2018-10-24 12:06:04,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:06:04,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:04,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:06:04,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:04,397 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:06:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:05,712 WARN L179 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 153 DAG size of output: 35 [2018-10-24 12:06:06,031 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2018-10-24 12:06:06,233 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2018-10-24 12:06:06,589 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 41 [2018-10-24 12:06:15,709 WARN L179 SmtUtils]: Spent 4.41 s on a formula simplification that was a NOOP. DAG size: 50 [2018-10-24 12:06:16,904 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 35 [2018-10-24 12:06:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:16,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:16,911 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:06:16,911 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:06:16,911 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:06:16,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:16,911 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 12:06:16,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:06:16,920 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:06:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:16,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:06:16,990 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-10-24 12:06:16,995 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:06:16,996 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:17,009 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:17,014 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-10-24 12:06:17,016 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:06:17,017 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:17,026 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:23,079 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:23,080 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:06:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:24,569 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:06:24,700 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2018-10-24 12:06:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:25,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:06:25,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 30 [2018-10-24 12:06:25,952 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:06:25,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 12:06:25,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 12:06:25,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=778, Unknown=2, NotChecked=0, Total=870 [2018-10-24 12:06:25,953 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 22 states. [2018-10-24 12:06:26,715 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2018-10-24 12:06:27,224 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2018-10-24 12:06:27,453 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2018-10-24 12:06:28,085 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2018-10-24 12:06:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:06:28,580 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-24 12:06:28,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 12:06:28,580 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-10-24 12:06:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:06:28,582 INFO L225 Difference]: With dead ends: 48 [2018-10-24 12:06:28,582 INFO L226 Difference]: Without dead ends: 38 [2018-10-24 12:06:28,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=211, Invalid=1593, Unknown=2, NotChecked=0, Total=1806 [2018-10-24 12:06:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-24 12:06:28,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-24 12:06:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-24 12:06:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-24 12:06:28,592 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 32 [2018-10-24 12:06:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:06:28,593 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-24 12:06:28,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 12:06:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-24 12:06:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-24 12:06:28,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:06:28,594 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:06:28,594 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:06:28,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1810116584, now seen corresponding path program 5 times [2018-10-24 12:06:28,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:06:28,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:28,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:06:28,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:28,596 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:06:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:30,028 WARN L179 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 110 DAG size of output: 34 [2018-10-24 12:06:30,784 WARN L179 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2018-10-24 12:06:31,131 WARN L179 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2018-10-24 12:06:31,542 WARN L179 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2018-10-24 12:06:34,331 WARN L179 SmtUtils]: Spent 2.75 s on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2018-10-24 12:06:44,228 WARN L179 SmtUtils]: Spent 7.72 s on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2018-10-24 12:06:53,820 WARN L179 SmtUtils]: Spent 7.38 s on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2018-10-24 12:06:54,033 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2018-10-24 12:06:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:54,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:54,047 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:06:54,048 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:06:54,048 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:06:54,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:54,048 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:06:54,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:06:54,057 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:07:00,858 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-24 12:07:00,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:07:00,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:07:00,883 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 12:07:00,883 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:08,930 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-10-24 12:07:08,945 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:07:08,945 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:08,947 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:08,953 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:08,953 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:07:10,385 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-10-24 12:07:11,029 WARN L179 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-10-24 12:07:11,931 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2018-10-24 12:07:16,724 WARN L179 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-10-24 12:07:16,955 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-10-24 12:07:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:07:17,169 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:07:17,644 WARN L179 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2018-10-24 12:07:17,870 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2018-10-24 12:07:20,028 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-10-24 12:07:20,354 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-10-24 12:07:20,822 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-10-24 12:07:21,284 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2018-10-24 12:07:21,841 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-10-24 12:07:22,692 WARN L179 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-10-24 12:07:23,300 WARN L179 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-10-24 12:07:24,186 WARN L179 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-10-24 12:07:25,676 WARN L179 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2018-10-24 12:07:26,774 WARN L179 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-24 12:07:28,850 WARN L179 SmtUtils]: Spent 386.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2018-10-24 12:07:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:07:28,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:07:28,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 45 [2018-10-24 12:07:28,907 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:07:28,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 12:07:28,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 12:07:28,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1772, Unknown=4, NotChecked=0, Total=1980 [2018-10-24 12:07:28,909 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 30 states. [2018-10-24 12:07:32,387 WARN L179 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 79 [2018-10-24 12:07:33,486 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 67 [2018-10-24 12:07:33,700 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2018-10-24 12:07:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:07:34,087 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-24 12:07:34,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:07:34,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 36 [2018-10-24 12:07:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:07:34,098 INFO L225 Difference]: With dead ends: 52 [2018-10-24 12:07:34,098 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 12:07:34,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 46.3s TimeCoverageRelationStatistics Valid=306, Invalid=2240, Unknown=4, NotChecked=0, Total=2550 [2018-10-24 12:07:34,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 12:07:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-24 12:07:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-24 12:07:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-24 12:07:34,107 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 36 [2018-10-24 12:07:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:07:34,108 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-24 12:07:34,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 12:07:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-24 12:07:34,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 12:07:34,109 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:07:34,109 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:07:34,109 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:07:34,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:07:34,110 INFO L82 PathProgramCache]: Analyzing trace with hash 668186770, now seen corresponding path program 6 times [2018-10-24 12:07:34,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:07:34,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:07:34,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:07:34,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:07:34,111 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:07:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:07:34,959 WARN L179 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 34 [2018-10-24 12:07:35,625 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2018-10-24 12:07:37,872 WARN L179 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2018-10-24 12:07:38,199 WARN L179 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2018-10-24 12:07:40,690 WARN L179 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2018-10-24 12:07:43,042 WARN L179 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2018-10-24 12:07:49,366 WARN L179 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2018-10-24 12:07:51,787 WARN L179 SmtUtils]: Spent 2.35 s on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2018-10-24 12:07:54,202 WARN L179 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2018-10-24 12:07:54,434 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2018-10-24 12:08:24,124 WARN L179 SmtUtils]: Spent 15.86 s on a formula simplification. DAG size of input: 84 DAG size of output: 70 [2018-10-24 12:08:58,074 WARN L179 SmtUtils]: Spent 31.73 s on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2018-10-24 12:08:58,406 WARN L179 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 41 [2018-10-24 12:08:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:08:58,432 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:08:58,432 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:08:58,432 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:08:58,433 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:08:58,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:08:58,433 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:08:58,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:08:58,444 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:08:58,550 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:08:58,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:08:58,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:08:58,569 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-10-24 12:08:58,587 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:08:58,588 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:58,596 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:58,600 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-10-24 12:08:58,602 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:08:58,603 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:58,612 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:09:04,661 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:09:04,662 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:09:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:09:17,421 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:09:20,049 WARN L179 SmtUtils]: Spent 2.63 s on a formula simplification. DAG size of input: 118 DAG size of output: 98 [2018-10-24 12:09:32,075 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-24 12:09:38,265 WARN L179 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2018-10-24 12:09:39,741 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-10-24 12:09:40,344 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-10-24 12:09:40,931 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-10-24 12:09:40,970 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:09:40,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:09:40,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 50 [2018-10-24 12:09:40,991 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:09:40,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 12:09:40,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 12:09:40,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2239, Unknown=18, NotChecked=0, Total=2450 [2018-10-24 12:09:40,993 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 35 states. [2018-10-24 12:09:41,823 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2018-10-24 12:09:42,437 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2018-10-24 12:09:45,102 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 Received shutdown request... [2018-10-24 12:09:49,808 WARN L187 SmtUtils]: Removed 4 from assertion stack [2018-10-24 12:09:49,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 12:09:49,809 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:09:49,813 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:09:49,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:09:49 BoogieIcfgContainer [2018-10-24 12:09:49,813 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:09:49,814 INFO L168 Benchmark]: Toolchain (without parser) took 265313.57 ms. Allocated memory was 1.6 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.4 GB in the beginning and 2.6 GB in the end (delta: -1.1 GB). Peak memory consumption was 552.9 MB. Max. memory is 7.1 GB. [2018-10-24 12:09:49,814 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:09:49,815 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.70 ms. Allocated memory is still 1.6 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 12:09:49,815 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.12 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:09:49,816 INFO L168 Benchmark]: Boogie Preprocessor took 28.09 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:09:49,816 INFO L168 Benchmark]: RCFGBuilder took 544.66 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 735.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -780.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2018-10-24 12:09:49,817 INFO L168 Benchmark]: TraceAbstraction took 264375.72 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 953.2 MB). Free memory was 2.2 GB in the beginning and 2.6 GB in the end (delta: -365.9 MB). Peak memory consumption was 587.3 MB. Max. memory is 7.1 GB. [2018-10-24 12:09:49,820 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.70 ms. Allocated memory is still 1.6 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 46.12 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.09 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 544.66 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 735.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -780.5 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264375.72 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 953.2 MB). Free memory was 2.2 GB in the beginning and 2.6 GB in the end (delta: -365.9 MB). Peak memory consumption was 587.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (41states) and FLOYD_HOARE automaton (currently 11 states, 35 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 129. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. TIMEOUT Result, 264.3s OverallTime, 11 OverallIterations, 6 TraceHistogramMax, 27.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 210 SDtfs, 310 SDslu, 1307 SDs, 0 SdLazy, 1726 SolverSat, 106 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 9.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 592 GetRequests, 298 SyntacticMatches, 21 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 201.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 7.3s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 46 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 220.8s InterpolantComputationTime, 509 NumberOfCodeBlocks, 501 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 696 ConstructedInterpolants, 148 QuantifiedInterpolants, 1129702 SizeOfPredicates, 143 NumberOfNonLiveVariables, 1029 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 28/480 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown