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/insertion_sort_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:05:22,791 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:05:22,795 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:05:22,811 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:05:22,812 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:05:22,814 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:05:22,815 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:05:22,818 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:05:22,822 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:05:22,824 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:05:22,826 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:05:22,826 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:05:22,827 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:05:22,828 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:05:22,829 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:05:22,830 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:05:22,831 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:05:22,833 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:05:22,834 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:05:22,836 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:05:22,837 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:05:22,839 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:05:22,841 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 12:05:22,853 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 12:05:22,880 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:05:22,880 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:05:22,881 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:05:22,882 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:05:22,882 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:05:22,882 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:05:22,882 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:05:22,883 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:05:22,883 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:05:22,883 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:05:22,883 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:05:22,883 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:05:22,884 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:05:22,885 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:05:22,885 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:05:22,885 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:05:22,885 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:05:22,885 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:05:22,887 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:05:22,887 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:05:22,888 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:05:22,888 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:05:22,888 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:05:22,888 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:05:22,888 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:05:22,889 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:05:22,889 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:05:22,889 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:05:22,890 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:05:22,890 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:05:22,890 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:05:22,890 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:05:22,890 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:05:22,890 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:05:22,949 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:05:22,965 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:05:22,972 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:05:22,973 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:05:22,974 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:05:22,975 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/insertion_sort_true-unreach-call_true-termination.i [2018-10-24 12:05:23,031 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/76ce1e475/bb511f2d68ce4630863d5550ae972e0a/FLAGab873035b [2018-10-24 12:05:23,466 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:05:23,466 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort_true-unreach-call_true-termination.i [2018-10-24 12:05:23,473 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/76ce1e475/bb511f2d68ce4630863d5550ae972e0a/FLAGab873035b [2018-10-24 12:05:23,489 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/76ce1e475/bb511f2d68ce4630863d5550ae972e0a [2018-10-24 12:05:23,500 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:05:23,502 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:05:23,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:05:23,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:05:23,508 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:05:23,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115858d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23, skipping insertion in model container [2018-10-24 12:05:23,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:05:23,550 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:05:23,781 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:05:23,785 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:05:23,812 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:05:23,834 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:05:23,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23 WrapperNode [2018-10-24 12:05:23,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:05:23,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:05:23,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:05:23,836 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:05:23,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,883 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:05:23,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:05:23,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:05:23,884 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:05:23,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,895 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,897 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (1/1) ... [2018-10-24 12:05:23,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:05:23,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:05:23,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:05:23,915 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:05:23,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (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 12:05:24,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:05:24,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:05:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:05:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:05:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:05:24,095 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:05:24,095 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:05:24,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:05:24,517 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:05:24,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:05:24 BoogieIcfgContainer [2018-10-24 12:05:24,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:05:24,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:05:24,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:05:24,522 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:05:24,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:05:23" (1/3) ... [2018-10-24 12:05:24,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351da1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:05:24, skipping insertion in model container [2018-10-24 12:05:24,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:05:23" (2/3) ... [2018-10-24 12:05:24,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351da1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:05:24, skipping insertion in model container [2018-10-24 12:05:24,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:05:24" (3/3) ... [2018-10-24 12:05:24,526 INFO L112 eAbstractionObserver]: Analyzing ICFG insertion_sort_true-unreach-call_true-termination.i [2018-10-24 12:05:24,537 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:05:24,548 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:05:24,568 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:05:24,610 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:05:24,610 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:05:24,610 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:05:24,610 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:05:24,611 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:05:24,611 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:05:24,611 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:05:24,611 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:05:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2018-10-24 12:05:24,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-24 12:05:24,636 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:24,637 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:24,639 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:24,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash 277130583, now seen corresponding path program 1 times [2018-10-24 12:05:24,647 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:24,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:24,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:24,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:24,696 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:24,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:24,789 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 12:05:24,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:05:24,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:05:24,792 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:05:24,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:05:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:05:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:05:24,812 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2018-10-24 12:05:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:24,841 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2018-10-24 12:05:24,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:05:24,843 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-10-24 12:05:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:24,851 INFO L225 Difference]: With dead ends: 56 [2018-10-24 12:05:24,851 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 12:05:24,855 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 12:05:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 12:05:24,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-24 12:05:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-24 12:05:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2018-10-24 12:05:24,895 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 14 [2018-10-24 12:05:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:24,896 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2018-10-24 12:05:24,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:05:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2018-10-24 12:05:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-24 12:05:24,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:24,898 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:24,898 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:24,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -32556863, now seen corresponding path program 1 times [2018-10-24 12:05:24,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:24,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:24,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:24,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:24,901 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:25,152 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 12:05:25,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:05:25,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:05:25,153 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:05:25,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:05:25,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:05:25,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:05:25,158 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2018-10-24 12:05:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:25,308 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2018-10-24 12:05:25,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:05:25,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2018-10-24 12:05:25,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:25,310 INFO L225 Difference]: With dead ends: 48 [2018-10-24 12:05:25,310 INFO L226 Difference]: Without dead ends: 34 [2018-10-24 12:05:25,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-24 12:05:25,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-24 12:05:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2018-10-24 12:05:25,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-24 12:05:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2018-10-24 12:05:25,318 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2018-10-24 12:05:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:25,318 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2018-10-24 12:05:25,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:05:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2018-10-24 12:05:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 12:05:25,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:25,319 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:25,320 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:25,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:25,320 INFO L82 PathProgramCache]: Analyzing trace with hash 894306866, now seen corresponding path program 1 times [2018-10-24 12:05:25,320 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:25,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:25,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:25,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:25,322 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:26,107 WARN L179 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 19 [2018-10-24 12:05:26,248 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 19 [2018-10-24 12:05:26,445 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 17 [2018-10-24 12:05:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:26,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:26,925 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:26,926 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-10-24 12:05:26,931 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [20], [23], [29], [35], [37], [41], [45], [50], [60], [63], [65], [71], [72], [73], [75] [2018-10-24 12:05:27,005 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:05:27,005 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:05:27,124 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 12:05:28,973 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:05:28,974 INFO L272 AbstractInterpreter]: Visited 22 different actions 166 times. Merged at 12 different actions 108 times. Widened at 3 different actions 15 times. Found 1 fixpoints after 1 different actions. Largest state had 38 variables. [2018-10-24 12:05:29,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:29,034 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:05:29,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:29,034 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 12:05:29,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:29,051 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:05:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:29,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:29,648 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 23 [2018-10-24 12:05:29,657 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:29,660 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-10-24 12:05:29,661 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:29,673 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:29,690 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:05:29,690 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:27 [2018-10-24 12:05:29,879 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 37 treesize of output 29 [2018-10-24 12:05:29,885 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:29,886 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:29,887 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:29,888 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:29,895 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-10-24 12:05:29,897 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:29,930 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:29,981 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:29,982 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2018-10-24 12:05:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:29,999 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:32,444 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 43 treesize of output 37 [2018-10-24 12:05:32,555 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2018-10-24 12:05:32,559 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:32,561 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:32,561 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:32,569 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 48 [2018-10-24 12:05:32,572 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 12:05:32,574 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:32,575 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:32,576 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:32,585 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 50 [2018-10-24 12:05:32,587 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2018-10-24 12:05:32,595 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:32,601 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2018-10-24 12:05:32,602 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:32,654 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:32,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:32,659 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:45, output treesize:8 [2018-10-24 12:05:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:32,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:32,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2018-10-24 12:05:32,732 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:32,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 12:05:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 12:05:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=595, Unknown=1, NotChecked=0, Total=702 [2018-10-24 12:05:32,734 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 20 states. [2018-10-24 12:05:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:33,945 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2018-10-24 12:05:33,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:05:33,946 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2018-10-24 12:05:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:33,950 INFO L225 Difference]: With dead ends: 76 [2018-10-24 12:05:33,950 INFO L226 Difference]: Without dead ends: 74 [2018-10-24 12:05:33,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=240, Invalid=1091, Unknown=1, NotChecked=0, Total=1332 [2018-10-24 12:05:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-24 12:05:33,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 45. [2018-10-24 12:05:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-24 12:05:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2018-10-24 12:05:33,968 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 23 [2018-10-24 12:05:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:33,969 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2018-10-24 12:05:33,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 12:05:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2018-10-24 12:05:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-24 12:05:33,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:33,970 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:33,971 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:33,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:33,971 INFO L82 PathProgramCache]: Analyzing trace with hash 307500852, now seen corresponding path program 1 times [2018-10-24 12:05:33,971 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:33,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:33,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:33,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:33,973 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:34,102 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:05:34,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:05:34,102 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:05:34,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:05:34,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:05:34,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:05:34,103 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 5 states. [2018-10-24 12:05:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:34,171 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2018-10-24 12:05:34,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:05:34,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-10-24 12:05:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:34,179 INFO L225 Difference]: With dead ends: 90 [2018-10-24 12:05:34,179 INFO L226 Difference]: Without dead ends: 53 [2018-10-24 12:05:34,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:05:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-24 12:05:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2018-10-24 12:05:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-24 12:05:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2018-10-24 12:05:34,188 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 23 [2018-10-24 12:05:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:34,188 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2018-10-24 12:05:34,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:05:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2018-10-24 12:05:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-24 12:05:34,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:34,189 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, 1, 1, 1] [2018-10-24 12:05:34,190 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:34,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash 692568650, now seen corresponding path program 1 times [2018-10-24 12:05:34,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:34,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:34,191 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:34,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:34,191 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:34,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:34,839 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:34,839 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-10-24 12:05:34,840 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [20], [23], [25], [29], [31], [35], [37], [41], [45], [50], [60], [63], [65], [71], [72], [73], [75] [2018-10-24 12:05:34,844 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:05:34,844 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:05:34,850 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 12:05:38,738 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:05:38,738 INFO L272 AbstractInterpreter]: Visited 24 different actions 400 times. Merged at 14 different actions 267 times. Widened at 4 different actions 34 times. Found 71 fixpoints after 5 different actions. Largest state had 39 variables. [2018-10-24 12:05:38,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:38,776 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:05:38,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:38,776 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 12:05:38,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:38,789 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:05:38,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:38,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:38,970 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 43 treesize of output 36 [2018-10-24 12:05:38,977 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:38,981 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 53 [2018-10-24 12:05:38,982 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:38,998 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:39,018 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:39,018 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:47 [2018-10-24 12:05:39,086 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:39,087 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 54 [2018-10-24 12:05:39,112 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:39,116 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:39,117 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2018-10-24 12:05:39,118 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:39,131 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:39,143 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:05:39,143 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:35 [2018-10-24 12:05:39,334 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 [2018-10-24 12:05:39,372 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:39,373 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-10-24 12:05:39,374 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:39,388 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:39,412 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:39,412 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2018-10-24 12:05:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:39,704 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:39,973 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 70 treesize of output 62 [2018-10-24 12:05:39,976 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:39,979 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 69 [2018-10-24 12:05:40,067 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,068 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,068 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,069 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,070 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,071 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,084 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 78 [2018-10-24 12:05:40,086 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts. [2018-10-24 12:05:40,095 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,097 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,098 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,099 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,100 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,121 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 83 [2018-10-24 12:05:40,125 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2018-10-24 12:05:40,161 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,170 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,183 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:40,187 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 47 [2018-10-24 12:05:40,188 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:40,260 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:40,265 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:40,272 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:40,272 INFO L202 ElimStorePlain]: Needed 6 recursive calls to eliminate 4 variables, input treesize:72, output treesize:13 [2018-10-24 12:05:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:42,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:42,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2018-10-24 12:05:42,430 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:42,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 12:05:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 12:05:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=708, Unknown=1, NotChecked=0, Total=812 [2018-10-24 12:05:42,432 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 20 states. [2018-10-24 12:05:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:43,762 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2018-10-24 12:05:43,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:05:43,763 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2018-10-24 12:05:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:43,765 INFO L225 Difference]: With dead ends: 121 [2018-10-24 12:05:43,765 INFO L226 Difference]: Without dead ends: 84 [2018-10-24 12:05:43,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=245, Invalid=1394, Unknown=1, NotChecked=0, Total=1640 [2018-10-24 12:05:43,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-24 12:05:43,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 48. [2018-10-24 12:05:43,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-24 12:05:43,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2018-10-24 12:05:43,775 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 27 [2018-10-24 12:05:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:43,776 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2018-10-24 12:05:43,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 12:05:43,776 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2018-10-24 12:05:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 12:05:43,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:43,777 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:43,777 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:43,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1150796076, now seen corresponding path program 1 times [2018-10-24 12:05:43,778 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:43,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:43,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:43,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:43,779 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:44,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:44,017 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:44,017 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-10-24 12:05:44,017 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [20], [23], [29], [35], [37], [41], [45], [50], [52], [54], [60], [63], [65], [68], [70], [71], [72], [73], [75], [76] [2018-10-24 12:05:44,020 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:05:44,020 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:05:44,024 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 12:05:45,325 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:05:45,325 INFO L272 AbstractInterpreter]: Visited 27 different actions 370 times. Merged at 15 different actions 196 times. Widened at 4 different actions 28 times. Found 11 fixpoints after 2 different actions. Largest state had 39 variables. [2018-10-24 12:05:45,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:45,363 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:05:45,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:45,363 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 12:05:45,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:45,375 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:05:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:45,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:45,499 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:46,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:46,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2018-10-24 12:05:46,269 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:46,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 12:05:46,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 12:05:46,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-24 12:05:46,270 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 9 states. [2018-10-24 12:05:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:46,426 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2018-10-24 12:05:46,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 12:05:46,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2018-10-24 12:05:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:46,427 INFO L225 Difference]: With dead ends: 69 [2018-10-24 12:05:46,427 INFO L226 Difference]: Without dead ends: 46 [2018-10-24 12:05:46,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-24 12:05:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-24 12:05:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2018-10-24 12:05:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-24 12:05:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-10-24 12:05:46,434 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2018-10-24 12:05:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:46,435 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-10-24 12:05:46,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 12:05:46,435 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-10-24 12:05:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-24 12:05:46,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:46,436 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:46,436 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:46,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1621042525, now seen corresponding path program 2 times [2018-10-24 12:05:46,437 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:46,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:46,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:46,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:46,438 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:46,985 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-10-24 12:05:47,168 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 12:05:47,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:47,168 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:47,168 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:05:47,168 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:05:47,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:47,169 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 12:05:47,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:05:47,176 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:05:47,246 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:05:47,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:05:47,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:47,463 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 23 treesize of output 18 [2018-10-24 12:05:47,504 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:47,507 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-24 12:05:47,507 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,514 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,523 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,523 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:26 [2018-10-24 12:05:47,676 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 21 [2018-10-24 12:05:47,680 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:47,681 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:47,682 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:47,687 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 46 [2018-10-24 12:05:47,688 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,697 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,705 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,706 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:20 [2018-10-24 12:05:47,727 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 18 [2018-10-24 12:05:47,730 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2018-10-24 12:05:47,731 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,732 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,734 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:47,734 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2018-10-24 12:05:47,752 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 12:05:47,752 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:50,320 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 49 treesize of output 43 [2018-10-24 12:05:50,324 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,325 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 50 [2018-10-24 12:05:50,505 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-10-24 12:05:50,509 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,512 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,512 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,513 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,514 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,533 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 83 [2018-10-24 12:05:50,537 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 4 xjuncts. [2018-10-24 12:05:50,542 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:05:50,542 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:50,545 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,546 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,547 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,549 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,550 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,570 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 81 [2018-10-24 12:05:50,572 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2018-10-24 12:05:50,577 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,594 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 52 [2018-10-24 12:05:50,596 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2018-10-24 12:05:50,599 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,600 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,601 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,602 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,603 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,621 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 81 [2018-10-24 12:05:50,625 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2018-10-24 12:05:50,627 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,629 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,630 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,631 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,646 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:50,663 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 83 [2018-10-24 12:05:50,667 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2018-10-24 12:05:50,670 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:05:50,670 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:50,740 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:05:50,756 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:05:50,805 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:05:50,806 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:62, output treesize:49 [2018-10-24 12:05:50,962 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 12:05:50,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:50,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 34 [2018-10-24 12:05:50,985 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:50,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 12:05:50,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 12:05:50,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=977, Unknown=1, NotChecked=0, Total=1122 [2018-10-24 12:05:50,987 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 20 states. [2018-10-24 12:05:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:51,960 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2018-10-24 12:05:51,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 12:05:51,961 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2018-10-24 12:05:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:51,963 INFO L225 Difference]: With dead ends: 116 [2018-10-24 12:05:51,964 INFO L226 Difference]: Without dead ends: 96 [2018-10-24 12:05:51,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=343, Invalid=1818, Unknown=1, NotChecked=0, Total=2162 [2018-10-24 12:05:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-24 12:05:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2018-10-24 12:05:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-24 12:05:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2018-10-24 12:05:51,978 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 31 [2018-10-24 12:05:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:51,979 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2018-10-24 12:05:51,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 12:05:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2018-10-24 12:05:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 12:05:51,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:51,980 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:51,981 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:51,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:51,981 INFO L82 PathProgramCache]: Analyzing trace with hash -693836487, now seen corresponding path program 1 times [2018-10-24 12:05:51,981 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:51,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:51,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:05:51,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:51,982 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:52,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:52,469 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-10-24 12:05:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:52,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:52,790 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:05:52,790 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 36 with the following transitions: [2018-10-24 12:05:52,791 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [20], [23], [29], [31], [35], [37], [41], [45], [50], [60], [63], [65], [71], [72], [73], [75] [2018-10-24 12:05:52,792 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:05:52,793 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:05:52,797 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 12:05:54,847 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:05:54,847 INFO L272 AbstractInterpreter]: Visited 23 different actions 255 times. Merged at 13 different actions 177 times. Widened at 4 different actions 31 times. Found 17 fixpoints after 4 different actions. Largest state had 39 variables. [2018-10-24 12:05:54,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:54,883 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:05:54,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:05:54,883 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 12:05:54,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:54,896 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:05:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:54,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:05:55,250 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 23 [2018-10-24 12:05:55,253 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:55,254 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 37 [2018-10-24 12:05:55,255 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,261 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,269 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:05:55,269 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:27 [2018-10-24 12:05:55,339 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 37 treesize of output 29 [2018-10-24 12:05:55,344 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:55,369 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:05:55,378 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:55,386 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:55,436 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 43 [2018-10-24 12:05:55,437 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,445 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,450 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:05:55,450 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2018-10-24 12:05:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:55,463 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:05:57,623 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 43 treesize of output 37 [2018-10-24 12:05:57,665 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:57,667 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:57,668 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:57,676 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 43 [2018-10-24 12:05:57,678 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 12:05:57,680 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:57,682 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2018-10-24 12:05:57,682 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 12:05:57,684 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:57,685 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:57,685 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:05:57,692 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 45 [2018-10-24 12:05:57,694 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2018-10-24 12:05:57,712 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-24 12:05:57,726 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:05:57,727 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:45, output treesize:10 [2018-10-24 12:05:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:05:57,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:05:57,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2018-10-24 12:05:57,895 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:05:57,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 12:05:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 12:05:57,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2018-10-24 12:05:57,897 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 24 states. [2018-10-24 12:05:59,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:05:59,551 INFO L93 Difference]: Finished difference Result 181 states and 219 transitions. [2018-10-24 12:05:59,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 12:05:59,551 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2018-10-24 12:05:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:05:59,553 INFO L225 Difference]: With dead ends: 181 [2018-10-24 12:05:59,553 INFO L226 Difference]: Without dead ends: 161 [2018-10-24 12:05:59,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=643, Invalid=3389, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 12:05:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-24 12:05:59,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 92. [2018-10-24 12:05:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-24 12:05:59,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2018-10-24 12:05:59,567 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 35 [2018-10-24 12:05:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:05:59,567 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2018-10-24 12:05:59,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 12:05:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2018-10-24 12:05:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 12:05:59,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:05:59,569 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:05:59,569 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:05:59,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:05:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1601373509, now seen corresponding path program 2 times [2018-10-24 12:05:59,570 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:05:59,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:59,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:05:59,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:05:59,571 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:05:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:05:59,831 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-24 12:06:00,286 WARN L179 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-10-24 12:06:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:00,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:00,743 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:06:00,743 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:06:00,744 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:06:00,744 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:00,744 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 12:06:00,751 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:06:00,752 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:06:00,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 12:06:00,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:06:00,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:06:00,904 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 43 treesize of output 36 [2018-10-24 12:06:00,907 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:00,910 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 53 [2018-10-24 12:06:00,911 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:00,932 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:00,945 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:00,946 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:54, output treesize:47 [2018-10-24 12:06:00,988 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:00,989 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2018-10-24 12:06:00,995 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:00,997 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:00,998 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 58 [2018-10-24 12:06:01,000 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,008 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,017 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,018 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:57, output treesize:29 [2018-10-24 12:06:01,207 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 20 [2018-10-24 12:06:01,213 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:01,214 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:01,215 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:01,217 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:01,220 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 53 [2018-10-24 12:06:01,222 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,232 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,243 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:19 [2018-10-24 12:06:01,273 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 [2018-10-24 12:06:01,276 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:01,276 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-10-24 12:06:01,277 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,279 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,280 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:01,281 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2018-10-24 12:06:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:01,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:06:06,002 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 76 treesize of output 68 [2018-10-24 12:06:06,005 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,007 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 75 [2018-10-24 12:06:06,022 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,024 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,027 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,028 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 72 [2018-10-24 12:06:06,114 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,114 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,118 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,118 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,119 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,128 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,141 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 83 [2018-10-24 12:06:06,143 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 4 xjuncts. [2018-10-24 12:06:06,146 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,146 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,150 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,151 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,152 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,161 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,175 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 81 [2018-10-24 12:06:06,178 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 4 xjuncts. [2018-10-24 12:06:06,249 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,309 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,310 INFO L303 Elim1Store]: Index analysis took 130 ms [2018-10-24 12:06:06,457 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 55 [2018-10-24 12:06:06,458 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 3 xjuncts. [2018-10-24 12:06:06,484 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,502 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,549 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,566 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,575 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,680 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,681 INFO L303 Elim1Store]: Index analysis took 221 ms [2018-10-24 12:06:06,850 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 83 [2018-10-24 12:06:06,854 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2018-10-24 12:06:06,872 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,888 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,944 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,953 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:06,966 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,082 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,082 INFO L303 Elim1Store]: Index analysis took 227 ms [2018-10-24 12:06:07,247 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 84 [2018-10-24 12:06:07,251 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 4 xjuncts. [2018-10-24 12:06:07,261 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:06:07,262 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:07,288 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,301 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,362 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,376 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,385 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,420 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:07,420 INFO L303 Elim1Store]: Index analysis took 158 ms [2018-10-24 12:06:07,433 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 81 [2018-10-24 12:06:07,435 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2018-10-24 12:06:07,578 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-10-24 12:06:07,616 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-10-24 12:06:07,651 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-10-24 12:06:07,694 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:06:07,694 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:87, output treesize:46 [2018-10-24 12:06:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:08,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:06:08,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 16] total 37 [2018-10-24 12:06:08,502 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:06:08,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 12:06:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 12:06:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1181, Unknown=3, NotChecked=0, Total=1332 [2018-10-24 12:06:08,503 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand 23 states. [2018-10-24 12:06:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:06:09,158 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2018-10-24 12:06:09,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 12:06:09,159 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2018-10-24 12:06:09,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:06:09,160 INFO L225 Difference]: With dead ends: 141 [2018-10-24 12:06:09,160 INFO L226 Difference]: Without dead ends: 120 [2018-10-24 12:06:09,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=232, Invalid=1657, Unknown=3, NotChecked=0, Total=1892 [2018-10-24 12:06:09,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-24 12:06:09,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2018-10-24 12:06:09,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-24 12:06:09,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2018-10-24 12:06:09,171 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 35 [2018-10-24 12:06:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:06:09,171 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2018-10-24 12:06:09,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 12:06:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2018-10-24 12:06:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 12:06:09,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:06:09,173 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:06:09,174 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:06:09,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash 99245443, now seen corresponding path program 2 times [2018-10-24 12:06:09,174 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:06:09,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:09,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:06:09,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:09,175 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:06:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:09,501 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-10-24 12:06:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:10,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:10,006 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:06:10,006 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:06:10,006 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:06:10,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:10,006 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 12:06:10,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:06:10,014 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:06:10,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:06:10,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:06:10,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:06:10,293 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 23 treesize of output 18 [2018-10-24 12:06:10,295 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:10,296 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 27 [2018-10-24 12:06:10,297 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,302 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,309 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,309 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2018-10-24 12:06:10,512 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 18 [2018-10-24 12:06:10,515 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2018-10-24 12:06:10,515 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,518 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,519 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,520 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2018-10-24 12:06:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:10,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:06:10,731 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 47 treesize of output 41 [2018-10-24 12:06:10,799 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:10,800 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:10,804 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:10,811 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 58 [2018-10-24 12:06:10,813 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 12:06:10,814 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:10,818 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2018-10-24 12:06:10,818 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,842 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:10,842 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:10,845 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:10,851 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 56 [2018-10-24 12:06:10,853 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2018-10-24 12:06:10,871 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,872 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:10,873 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:47, output treesize:5 [2018-10-24 12:06:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:10,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:06:10,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 13] total 35 [2018-10-24 12:06:10,908 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:06:10,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 12:06:10,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 12:06:10,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 12:06:10,910 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 32 states. [2018-10-24 12:06:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:06:28,239 INFO L93 Difference]: Finished difference Result 145 states and 170 transitions. [2018-10-24 12:06:28,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 12:06:28,239 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 40 [2018-10-24 12:06:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:06:28,241 INFO L225 Difference]: With dead ends: 145 [2018-10-24 12:06:28,241 INFO L226 Difference]: Without dead ends: 143 [2018-10-24 12:06:28,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=336, Invalid=2316, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 12:06:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-24 12:06:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 105. [2018-10-24 12:06:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-24 12:06:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2018-10-24 12:06:28,253 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 40 [2018-10-24 12:06:28,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:06:28,253 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2018-10-24 12:06:28,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 12:06:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2018-10-24 12:06:28,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-24 12:06:28,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:06:28,255 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:06:28,256 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:06:28,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1042006481, now seen corresponding path program 3 times [2018-10-24 12:06:28,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:06:28,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:28,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:06:28,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:28,257 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:06:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:28,469 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-24 12:06:28,705 WARN L179 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-24 12:06:29,120 WARN L179 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2018-10-24 12:06:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:29,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:29,757 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:06:29,757 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:06:29,757 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:06:29,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:29,758 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:06:29,765 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:06:29,766 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:06:29,801 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:06:29,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:06:29,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:06:29,953 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 43 treesize of output 36 [2018-10-24 12:06:29,979 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:29,985 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 53 [2018-10-24 12:06:29,986 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:29,994 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,006 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,007 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:51, output treesize:44 [2018-10-24 12:06:30,125 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:30,126 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 54 [2018-10-24 12:06:30,130 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:30,132 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:30,132 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 61 [2018-10-24 12:06:30,133 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,142 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,154 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:06:30,154 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:35 [2018-10-24 12:06:30,212 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 20 [2018-10-24 12:06:30,217 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:30,217 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2018-10-24 12:06:30,218 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,220 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,223 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,223 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2018-10-24 12:06:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 12:06:30,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:06:30,736 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 70 treesize of output 62 [2018-10-24 12:06:30,753 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,755 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 69 [2018-10-24 12:06:30,810 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:06:30,810 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,814 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,814 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,815 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,815 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,817 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,817 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,830 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 78 [2018-10-24 12:06:30,831 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2018-10-24 12:06:30,834 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,834 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,835 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,835 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,837 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,838 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:30,851 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 78 [2018-10-24 12:06:30,853 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 2 xjuncts. [2018-10-24 12:06:30,878 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,883 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,890 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:30,891 INFO L202 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:75, output treesize:16 [2018-10-24 12:06:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-10-24 12:06:30,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:06:30,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12] total 34 [2018-10-24 12:06:30,951 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:06:30,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 12:06:30,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 12:06:30,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 12:06:30,953 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 25 states. [2018-10-24 12:06:33,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:06:33,330 INFO L93 Difference]: Finished difference Result 235 states and 286 transitions. [2018-10-24 12:06:33,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 12:06:33,331 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 39 [2018-10-24 12:06:33,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:06:33,333 INFO L225 Difference]: With dead ends: 235 [2018-10-24 12:06:33,333 INFO L226 Difference]: Without dead ends: 195 [2018-10-24 12:06:33,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=576, Invalid=3846, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 12:06:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-24 12:06:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 122. [2018-10-24 12:06:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-24 12:06:33,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 146 transitions. [2018-10-24 12:06:33,350 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 146 transitions. Word has length 39 [2018-10-24 12:06:33,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:06:33,350 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 146 transitions. [2018-10-24 12:06:33,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 12:06:33,351 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 146 transitions. [2018-10-24 12:06:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-24 12:06:33,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:06:33,352 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:06:33,353 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:06:33,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:33,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1926599722, now seen corresponding path program 2 times [2018-10-24 12:06:33,353 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:06:33,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:33,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:06:33,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:33,354 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:06:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:33,782 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2018-10-24 12:06:34,568 WARN L179 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 19 [2018-10-24 12:06:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:34,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:34,682 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:06:34,682 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:06:34,682 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:06:34,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:34,682 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:06:34,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:06:34,693 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:06:34,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 12:06:34,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:06:34,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:06:34,809 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 24 treesize of output 19 [2018-10-24 12:06:34,816 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:34,817 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 29 [2018-10-24 12:06:34,818 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,826 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,837 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:06:34,838 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2018-10-24 12:06:34,912 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 20 [2018-10-24 12:06:34,914 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:34,915 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:34,916 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:34,920 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 43 [2018-10-24 12:06:34,920 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,929 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,941 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,942 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:24 [2018-10-24 12:06:34,965 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 20 [2018-10-24 12:06:34,967 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:34,968 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:34,969 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:34,973 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 43 [2018-10-24 12:06:34,974 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,984 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,996 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:34,997 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:43, output treesize:24 [2018-10-24 12:06:35,059 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 20 [2018-10-24 12:06:35,062 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:35,063 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:35,064 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:35,068 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 43 [2018-10-24 12:06:35,069 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:35,078 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:35,086 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:35,087 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:35, output treesize:19 [2018-10-24 12:06:35,314 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 18 [2018-10-24 12:06:35,341 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2018-10-24 12:06:35,341 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:35,370 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:35,390 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:35,390 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2018-10-24 12:06:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:35,424 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:06:43,288 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 55 treesize of output 49 [2018-10-24 12:06:43,292 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,294 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 56 [2018-10-24 12:06:43,297 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,330 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 79 [2018-10-24 12:06:43,582 WARN L179 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2018-10-24 12:06:43,586 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,587 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,587 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,588 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,588 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,589 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,593 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,597 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 66 [2018-10-24 12:06:43,598 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:43,601 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,602 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,603 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,614 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,614 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,615 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,618 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,621 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 66 [2018-10-24 12:06:43,622 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:43,626 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,627 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,627 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,628 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,628 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,628 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,633 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,637 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 64 [2018-10-24 12:06:43,638 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:43,641 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:06:43,641 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:43,643 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:06:43,643 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:43,645 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,646 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,647 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,651 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2018-10-24 12:06:43,652 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:43,655 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,655 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,656 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,656 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,656 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,657 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,661 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,665 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 64 [2018-10-24 12:06:43,666 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:43,827 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,827 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,830 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,831 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,835 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,835 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,841 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,875 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 111 [2018-10-24 12:06:43,881 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 15 xjuncts. [2018-10-24 12:06:43,897 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,902 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:43,942 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 80 [2018-10-24 12:06:43,947 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 16 xjuncts. [2018-10-24 12:06:44,164 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,165 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,166 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,169 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,170 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,173 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,183 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 67 [2018-10-24 12:06:44,185 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 2 xjuncts. [2018-10-24 12:06:44,192 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,193 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,193 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:44,197 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2018-10-24 12:06:44,197 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:44,246 INFO L267 ElimStorePlain]: Start of recursive call 4: 3 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:06:44,266 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:06:44,284 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:06:44,311 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:06:44,311 INFO L202 ElimStorePlain]: Needed 15 recursive calls to eliminate 6 variables, input treesize:74, output treesize:43 [2018-10-24 12:06:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:44,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:06:44,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 39 [2018-10-24 12:06:44,441 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:06:44,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 12:06:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 12:06:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1291, Unknown=2, NotChecked=0, Total=1482 [2018-10-24 12:06:44,443 INFO L87 Difference]: Start difference. First operand 122 states and 146 transitions. Second operand 21 states. [2018-10-24 12:06:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:06:45,397 INFO L93 Difference]: Finished difference Result 280 states and 343 transitions. [2018-10-24 12:06:45,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 12:06:45,401 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2018-10-24 12:06:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:06:45,403 INFO L225 Difference]: With dead ends: 280 [2018-10-24 12:06:45,403 INFO L226 Difference]: Without dead ends: 228 [2018-10-24 12:06:45,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 54 SyntacticMatches, 15 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=377, Invalid=2171, Unknown=2, NotChecked=0, Total=2550 [2018-10-24 12:06:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-24 12:06:45,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 130. [2018-10-24 12:06:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-24 12:06:45,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 156 transitions. [2018-10-24 12:06:45,419 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 156 transitions. Word has length 43 [2018-10-24 12:06:45,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:06:45,420 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 156 transitions. [2018-10-24 12:06:45,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 12:06:45,420 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 156 transitions. [2018-10-24 12:06:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-24 12:06:45,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:06:45,422 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:06:45,422 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:06:45,422 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:45,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1130767443, now seen corresponding path program 1 times [2018-10-24 12:06:45,422 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:06:45,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:45,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:06:45,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:06:45,423 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:06:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:45,811 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:45,811 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:06:45,811 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-10-24 12:06:45,811 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [18], [20], [23], [29], [31], [35], [37], [41], [45], [50], [52], [54], [60], [63], [65], [68], [70], [71], [72], [73], [75], [76] [2018-10-24 12:06:45,814 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-24 12:06:45,814 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:06:45,818 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-24 12:06:47,887 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:06:47,887 INFO L272 AbstractInterpreter]: Visited 28 different actions 413 times. Merged at 16 different actions 245 times. Widened at 5 different actions 39 times. Found 29 fixpoints after 6 different actions. Largest state had 40 variables. [2018-10-24 12:06:47,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:06:47,926 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:06:47,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:06:47,926 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:06:47,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:06:47,940 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:06:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:06:47,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:06:48,664 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 34 treesize of output 27 [2018-10-24 12:06:48,666 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:48,667 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2018-10-24 12:06:48,667 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:48,676 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:48,684 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:48,684 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2018-10-24 12:06:48,929 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-10-24 12:06:48,961 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:48,962 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 45 [2018-10-24 12:06:48,999 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:49,011 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:49,081 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:49,081 INFO L303 Elim1Store]: Index analysis took 118 ms [2018-10-24 12:06:49,082 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 59 [2018-10-24 12:06:49,082 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:49,121 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:49,129 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:06:49,130 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:49, output treesize:27 [2018-10-24 12:06:53,277 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 40 treesize of output 32 [2018-10-24 12:06:53,279 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:53,279 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:53,281 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:53,281 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:06:53,283 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:06:53,284 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 52 [2018-10-24 12:06:53,285 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:06:53,291 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:53,293 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:06:53,293 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:5 [2018-10-24 12:06:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:06:53,337 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:07:04,144 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 74 treesize of output 66 [2018-10-24 12:07:04,149 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,151 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 73 [2018-10-24 12:07:04,227 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,228 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,228 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,229 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,230 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,230 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,231 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,236 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,237 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,239 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 91 [2018-10-24 12:07:04,241 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:04,245 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,245 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,246 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,246 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,247 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,247 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,247 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,255 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 84 [2018-10-24 12:07:04,256 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:04,259 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,259 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,260 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,260 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,261 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,264 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 57 [2018-10-24 12:07:04,265 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:04,268 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,269 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,269 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,270 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,270 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,271 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,271 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,278 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,279 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,281 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 90 [2018-10-24 12:07:04,282 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:04,288 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,288 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,289 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,289 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,290 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,290 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,290 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,296 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,296 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,300 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 90 [2018-10-24 12:07:04,301 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:04,304 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,304 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,305 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,306 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,307 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,307 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,321 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 89 [2018-10-24 12:07:04,323 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 2 xjuncts. [2018-10-24 12:07:04,326 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,326 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,326 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:07:04,331 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 56 [2018-10-24 12:07:04,332 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:04,377 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-24 12:07:04,392 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-10-24 12:07:04,413 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-24 12:07:04,413 INFO L202 ElimStorePlain]: Needed 10 recursive calls to eliminate 5 variables, input treesize:82, output treesize:31 [2018-10-24 12:07:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 22 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:07:04,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:07:04,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 15] total 37 [2018-10-24 12:07:04,504 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:07:04,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 12:07:04,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 12:07:04,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1193, Unknown=5, NotChecked=0, Total=1332 [2018-10-24 12:07:04,505 INFO L87 Difference]: Start difference. First operand 130 states and 156 transitions. Second operand 27 states. [2018-10-24 12:07:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:07:47,601 INFO L93 Difference]: Finished difference Result 252 states and 304 transitions. [2018-10-24 12:07:47,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 12:07:47,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2018-10-24 12:07:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:07:47,604 INFO L225 Difference]: With dead ends: 252 [2018-10-24 12:07:47,604 INFO L226 Difference]: Without dead ends: 200 [2018-10-24 12:07:47,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=314, Invalid=2541, Unknown=7, NotChecked=0, Total=2862 [2018-10-24 12:07:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2018-10-24 12:07:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2018-10-24 12:07:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-24 12:07:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 178 transitions. [2018-10-24 12:07:47,622 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 178 transitions. Word has length 44 [2018-10-24 12:07:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:07:47,622 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 178 transitions. [2018-10-24 12:07:47,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 12:07:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 178 transitions. [2018-10-24 12:07:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-24 12:07:47,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:07:47,624 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:07:47,624 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:07:47,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:07:47,624 INFO L82 PathProgramCache]: Analyzing trace with hash 596360874, now seen corresponding path program 3 times [2018-10-24 12:07:47,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:07:47,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:07:47,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:07:47,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:07:47,626 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:07:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:07:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:07:48,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:07:48,281 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:07:48,281 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:07:48,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:07:48,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:07:48,282 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:07:48,289 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:07:48,289 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:07:48,337 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:07:48,337 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:07:48,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:07:48,413 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 11 treesize of output 8 [2018-10-24 12:07:48,416 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 8 treesize of output 7 [2018-10-24 12:07:48,416 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,418 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,445 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,445 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:25, output treesize:14 [2018-10-24 12:07:48,541 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 29 treesize of output 24 [2018-10-24 12:07:48,544 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:07:48,546 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 39 [2018-10-24 12:07:48,546 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,552 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,560 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,561 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2018-10-24 12:07:48,710 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 20 [2018-10-24 12:07:48,712 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:07:48,713 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:07:48,715 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:07:48,719 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 43 [2018-10-24 12:07:48,720 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,728 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,740 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:48,740 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:19 [2018-10-24 12:07:48,959 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 18 [2018-10-24 12:07:48,995 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2018-10-24 12:07:48,995 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:07:49,022 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:49,047 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:07:49,048 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2018-10-24 12:07:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:07:49,359 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:08:14,830 WARN L179 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-10-24 12:08:14,859 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 74 [2018-10-24 12:08:14,880 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 59 treesize of output 74 [2018-10-24 12:08:14,881 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-10-24 12:08:14,936 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 60 treesize of output 59 [2018-10-24 12:08:14,937 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:15,011 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2018-10-24 12:08:15,018 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,174 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 65 [2018-10-24 12:08:15,327 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2018-10-24 12:08:15,330 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,331 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,335 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,335 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,336 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,384 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 93 [2018-10-24 12:08:15,386 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:15,390 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,391 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,393 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,394 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,394 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,419 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 95 [2018-10-24 12:08:15,421 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:15,423 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:08:15,424 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:15,426 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,426 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,429 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,430 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,431 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,454 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 95 [2018-10-24 12:08:15,456 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:15,461 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,481 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 71 [2018-10-24 12:08:15,482 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:15,486 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,487 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,490 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,491 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,492 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,514 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 93 [2018-10-24 12:08:15,516 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:15,519 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,520 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,524 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,525 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,526 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,549 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 96 [2018-10-24 12:08:15,551 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:15,722 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,723 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,729 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,734 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,735 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,784 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 121 [2018-10-24 12:08:15,785 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:08:15,799 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 39 xjuncts. [2018-10-24 12:08:15,812 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:15,857 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 91 [2018-10-24 12:08:15,864 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 32 xjuncts. [2018-10-24 12:08:16,294 INFO L267 ElimStorePlain]: Start of recursive call 6: 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2018-10-24 12:08:16,372 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 7 xjuncts. [2018-10-24 12:08:16,512 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 56 [2018-10-24 12:08:16,516 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 51 treesize of output 45 [2018-10-24 12:08:16,516 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:16,607 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,627 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 65 [2018-10-24 12:08:16,779 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2018-10-24 12:08:16,784 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,788 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,790 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,798 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,798 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,850 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 124 [2018-10-24 12:08:16,850 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:08:16,863 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 39 xjuncts. [2018-10-24 12:08:16,904 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,963 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:16,993 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,074 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,084 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,209 INFO L303 Elim1Store]: Index analysis took 345 ms [2018-10-24 12:08:17,243 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 126 [2018-10-24 12:08:17,243 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:08:17,255 INFO L267 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 39 xjuncts. [2018-10-24 12:08:17,283 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,287 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,290 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,295 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,296 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,345 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 126 [2018-10-24 12:08:17,345 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:08:17,356 INFO L267 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 39 xjuncts. [2018-10-24 12:08:17,361 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:08:17,361 INFO L267 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:17,364 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,367 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,369 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,375 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,375 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,426 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 124 [2018-10-24 12:08:17,426 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:08:17,436 INFO L267 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 39 xjuncts. [2018-10-24 12:08:17,438 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:08:17,438 INFO L267 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:17,466 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:17,503 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 91 [2018-10-24 12:08:17,506 INFO L267 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 32 xjuncts. [2018-10-24 12:08:19,228 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,230 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,231 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,233 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,233 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,255 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 90 [2018-10-24 12:08:19,257 INFO L267 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:19,263 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,299 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 68 [2018-10-24 12:08:19,300 INFO L267 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:19,511 INFO L267 ElimStorePlain]: Start of recursive call 18: 2 dim-1 vars, End of recursive call: and 12 xjuncts. [2018-10-24 12:08:19,694 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,696 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 53 [2018-10-24 12:08:19,768 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,769 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,780 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,780 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,781 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,802 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 83 [2018-10-24 12:08:19,804 INFO L267 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:19,807 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,808 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,811 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,811 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,812 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,834 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 81 [2018-10-24 12:08:19,836 INFO L267 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:19,839 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:08:19,839 INFO L267 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:19,841 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,842 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,845 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,846 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,847 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,871 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 81 [2018-10-24 12:08:19,873 INFO L267 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:19,876 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,877 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,881 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,882 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,882 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,906 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 83 [2018-10-24 12:08:19,908 INFO L267 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:19,910 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:08:19,910 INFO L267 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:19,916 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:19,935 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 56 [2018-10-24 12:08:19,936 INFO L267 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,021 INFO L267 ElimStorePlain]: Start of recursive call 28: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2018-10-24 12:08:20,152 INFO L267 ElimStorePlain]: Start of recursive call 16: 3 dim-1 vars, End of recursive call: and 10 xjuncts. [2018-10-24 12:08:20,389 INFO L267 ElimStorePlain]: Start of recursive call 2: 2 dim-1 vars, 3 dim-2 vars, End of recursive call: and 10 xjuncts. [2018-10-24 12:08:20,395 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 59 [2018-10-24 12:08:20,399 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 9 treesize of output 13 [2018-10-24 12:08:20,400 INFO L267 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:20,413 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2018-10-24 12:08:20,418 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,420 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 51 [2018-10-24 12:08:20,490 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,508 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 59 [2018-10-24 12:08:20,509 INFO L267 ElimStorePlain]: Start of recursive call 40: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,512 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:08:20,512 INFO L267 ElimStorePlain]: Start of recursive call 41: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:20,514 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,515 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,519 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,520 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,521 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,543 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 83 [2018-10-24 12:08:20,545 INFO L267 ElimStorePlain]: Start of recursive call 42: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,548 WARN L307 Elim1Store]: Array PQE input equivalent to true [2018-10-24 12:08:20,548 INFO L267 ElimStorePlain]: Start of recursive call 43: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:20,551 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,551 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,556 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,557 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,557 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,581 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 83 [2018-10-24 12:08:20,582 INFO L267 ElimStorePlain]: Start of recursive call 44: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,585 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,586 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,591 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,591 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,592 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,616 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 85 [2018-10-24 12:08:20,618 INFO L267 ElimStorePlain]: Start of recursive call 45: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,621 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,622 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,626 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,627 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,627 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:20,650 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 85 [2018-10-24 12:08:20,652 INFO L267 ElimStorePlain]: Start of recursive call 46: End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,755 INFO L267 ElimStorePlain]: Start of recursive call 39: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,784 INFO L267 ElimStorePlain]: Start of recursive call 38: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,819 INFO L267 ElimStorePlain]: Start of recursive call 36: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,956 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 4 xjuncts. [2018-10-24 12:08:20,957 INFO L202 ElimStorePlain]: Needed 46 recursive calls to eliminate 8 variables, input treesize:86, output treesize:42 [2018-10-24 12:08:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:08:21,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:08:21,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 39 [2018-10-24 12:08:21,081 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:08:21,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 12:08:21,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 12:08:21,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1313, Unknown=10, NotChecked=0, Total=1482 [2018-10-24 12:08:21,085 INFO L87 Difference]: Start difference. First operand 148 states and 178 transitions. Second operand 24 states. [2018-10-24 12:08:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:08:22,395 INFO L93 Difference]: Finished difference Result 303 states and 363 transitions. [2018-10-24 12:08:22,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 12:08:22,395 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 43 [2018-10-24 12:08:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:08:22,398 INFO L225 Difference]: With dead ends: 303 [2018-10-24 12:08:22,398 INFO L226 Difference]: Without dead ends: 220 [2018-10-24 12:08:22,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=349, Invalid=2293, Unknown=10, NotChecked=0, Total=2652 [2018-10-24 12:08:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-24 12:08:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 160. [2018-10-24 12:08:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-24 12:08:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 193 transitions. [2018-10-24 12:08:22,416 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 193 transitions. Word has length 43 [2018-10-24 12:08:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:08:22,416 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 193 transitions. [2018-10-24 12:08:22,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 12:08:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 193 transitions. [2018-10-24 12:08:22,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-24 12:08:22,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:08:22,417 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:08:22,418 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:08:22,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:08:22,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1833906732, now seen corresponding path program 4 times [2018-10-24 12:08:22,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:08:22,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:08:22,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:08:22,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:08:22,419 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:08:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:08:22,625 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-10-24 12:08:22,918 WARN L179 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2018-10-24 12:08:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:08:23,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:08:23,545 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:08:23,545 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:08:23,545 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:08:23,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:08:23,545 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:08:23,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:08:23,554 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:08:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:08:23,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:08:23,763 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 16 treesize of output 13 [2018-10-24 12:08:23,766 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 13 treesize of output 12 [2018-10-24 12:08:23,766 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:23,769 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:23,788 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 25 treesize of output 21 [2018-10-24 12:08:23,798 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 9 [2018-10-24 12:08:23,799 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:23,801 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:23,813 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-10-24 12:08:23,813 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:57, output treesize:31 [2018-10-24 12:08:24,208 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 26 [2018-10-24 12:08:24,212 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,213 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,214 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 54 [2018-10-24 12:08:24,215 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,225 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,242 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 12:08:24,242 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:50, output treesize:38 [2018-10-24 12:08:24,391 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 35 treesize of output 28 [2018-10-24 12:08:24,424 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,447 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,469 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,494 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,499 INFO L303 Elim1Store]: Index analysis took 106 ms [2018-10-24 12:08:24,499 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 85 [2018-10-24 12:08:24,500 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,512 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,528 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 12:08:24,529 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:56, output treesize:38 [2018-10-24 12:08:24,640 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 35 treesize of output 28 [2018-10-24 12:08:24,644 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,645 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,646 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,647 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,651 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 85 [2018-10-24 12:08:24,651 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,665 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,683 INFO L267 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-10-24 12:08:24,683 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:57, output treesize:35 [2018-10-24 12:08:24,770 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 40 treesize of output 32 [2018-10-24 12:08:24,773 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,774 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,774 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:24,775 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:08:24,777 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:08:24,778 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 51 [2018-10-24 12:08:24,779 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,786 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,793 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:08:24,794 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:51, output treesize:5 [2018-10-24 12:08:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:08:24,822 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:09:36,548 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 59 treesize of output 55 [2018-10-24 12:09:36,552 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2018-10-24 12:09:36,572 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 51 treesize of output 61 [2018-10-24 12:09:36,618 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 84 [2018-10-24 12:09:37,346 WARN L179 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 165 [2018-10-24 12:09:37,357 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,358 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,359 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,372 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,382 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:09:37,422 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 116 [2018-10-24 12:09:37,422 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:09:37,427 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 11 xjuncts. [2018-10-24 12:09:37,436 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,437 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,438 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,451 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,458 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:09:37,496 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 116 [2018-10-24 12:09:37,497 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:09:37,500 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 11 xjuncts. [2018-10-24 12:09:37,578 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,579 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,580 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,591 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,599 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:09:37,641 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 118 [2018-10-24 12:09:37,642 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:09:37,646 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 11 xjuncts. [2018-10-24 12:09:37,697 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:09:37,730 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 76 [2018-10-24 12:09:37,732 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 8 xjuncts. [2018-10-24 12:09:37,748 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,749 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,750 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,763 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,773 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:09:37,816 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 117 [2018-10-24 12:09:37,816 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:09:37,821 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 11 xjuncts. [2018-10-24 12:09:37,854 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,855 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,856 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,870 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,880 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:09:37,920 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 118 [2018-10-24 12:09:37,920 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:09:37,924 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 11 xjuncts. [2018-10-24 12:09:37,931 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:37,944 INFO L700 Elim1Store]: detected not equals via solver [2018-10-24 12:09:37,971 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 51 treesize of output 80 [2018-10-24 12:09:37,972 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 8 xjuncts. [2018-10-24 12:09:39,718 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:39,720 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:39,732 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 59 [2018-10-24 12:09:39,732 INFO L267 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 2 xjuncts. [2018-10-24 12:09:39,738 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:39,768 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 72 [2018-10-24 12:09:39,769 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 4 xjuncts. [2018-10-24 12:09:39,803 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:39,806 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:39,806 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:39,818 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:39,852 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 107 [2018-10-24 12:09:39,853 INFO L267 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 6 xjuncts. [2018-10-24 12:09:41,456 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:41,459 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:41,459 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:41,468 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:41,494 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 102 [2018-10-24 12:09:41,496 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 6 xjuncts. [2018-10-24 12:09:41,501 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:41,523 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 72 [2018-10-24 12:09:41,524 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 4 xjuncts. [2018-10-24 12:09:41,528 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:41,528 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:41,541 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 54 [2018-10-24 12:09:41,542 INFO L267 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 2 xjuncts. [2018-10-24 12:09:43,070 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 52 [2018-10-24 12:09:43,071 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 2 xjuncts. [2018-10-24 12:09:43,095 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:43,136 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:43,183 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:43,183 INFO L303 Elim1Store]: Index analysis took 111 ms [2018-10-24 12:09:43,257 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 67 [2018-10-24 12:09:43,257 INFO L267 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 2 xjuncts. [2018-10-24 12:09:43,270 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 38 [2018-10-24 12:09:43,271 INFO L267 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 2 xjuncts. [2018-10-24 12:09:43,896 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 90 [2018-10-24 12:09:43,897 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2018-10-24 12:09:43,904 INFO L267 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 64 xjuncts. [2018-10-24 12:09:43,915 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:43,916 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:43,930 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:43,989 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 2 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 135 [2018-10-24 12:09:43,989 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 8 [2018-10-24 12:09:44,021 INFO L267 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 116 xjuncts. [2018-10-24 12:09:44,034 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:44,036 INFO L682 Elim1Store]: detected equality via solver [2018-10-24 12:09:44,051 INFO L682 Elim1Store]: detected equality via solver Received shutdown request... [2018-10-24 12:09:44,117 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 12:09:44,317 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:09:44,318 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:09:44,323 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:09:44,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:09:44 BoogieIcfgContainer [2018-10-24 12:09:44,323 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:09:44,324 INFO L168 Benchmark]: Toolchain (without parser) took 260823.42 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.6 GB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -410.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 12:09:44,325 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:09:44,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 332.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:09:44,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:09:44,325 INFO L168 Benchmark]: Boogie Preprocessor took 30.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:09:44,325 INFO L168 Benchmark]: RCFGBuilder took 603.49 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -816.6 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2018-10-24 12:09:44,326 INFO L168 Benchmark]: TraceAbstraction took 259804.33 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 849.3 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 395.8 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-10-24 12:09:44,327 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 332.40 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 603.49 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 784.9 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -816.6 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 259804.33 ms. Allocated memory was 2.3 GB in the beginning and 3.2 GB in the end (delta: 849.3 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 395.8 MB). Peak memory consumption was 1.2 GB. 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 analyzing trace of length 44 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while SimplifyDDAWithTimeout was simplifying term of DAG size 48. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. TIMEOUT Result, 259.7s OverallTime, 15 OverallIterations, 4 TraceHistogramMax, 71.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 478 SDtfs, 1280 SDslu, 3972 SDs, 0 SdLazy, 4731 SolverSat, 779 SolverUnsat, 27 SolverUnknown, 0 SolverNotchecked, 59.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1148 GetRequests, 562 SyntacticMatches, 75 SemanticMatches, 511 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 6725 ImplicationChecksByTransitivity, 88.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 11.5s AbstIntTime, 5 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 530 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 93.1s InterpolantComputationTime, 836 NumberOfCodeBlocks, 836 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1192 ConstructedInterpolants, 119 QuantifiedInterpolants, 603507 SizeOfPredicates, 334 NumberOfNonLiveVariables, 1989 ConjunctsInSsa, 575 ConjunctsInUnsatCore, 36 InterpolantComputations, 3 PerfectInterpolantSequences, 72/677 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown