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/loop-new/nested_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 16:10:15,789 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 16:10:15,791 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 16:10:15,810 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 16:10:15,810 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 16:10:15,811 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 16:10:15,813 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 16:10:15,816 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 16:10:15,818 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 16:10:15,820 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 16:10:15,822 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 16:10:15,823 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 16:10:15,824 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 16:10:15,825 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 16:10:15,833 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 16:10:15,834 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 16:10:15,837 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 16:10:15,841 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 16:10:15,846 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 16:10:15,847 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 16:10:15,849 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 16:10:15,851 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 16:10:15,853 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 16:10:15,853 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 16:10:15,853 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 16:10:15,856 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 16:10:15,857 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 16:10:15,858 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 16:10:15,860 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 16:10:15,862 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 16:10:15,862 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 16:10:15,863 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 16:10:15,863 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 16:10:15,863 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 16:10:15,866 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 16:10:15,868 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 16:10:15,868 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 [2018-10-22 16:10:15,888 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 16:10:15,888 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 16:10:15,889 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 16:10:15,889 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 16:10:15,889 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 16:10:15,889 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 16:10:15,890 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 16:10:15,890 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 16:10:15,890 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-22 16:10:15,890 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 16:10:15,890 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 16:10:15,891 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 16:10:15,891 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 16:10:15,891 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 16:10:15,892 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 16:10:15,892 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 16:10:15,892 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 16:10:15,892 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 16:10:15,892 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 16:10:15,892 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 16:10:15,893 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 16:10:15,893 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 16:10:15,893 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 16:10:15,893 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 16:10:15,893 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 16:10:15,894 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 16:10:15,894 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 16:10:15,894 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 16:10:15,894 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 16:10:15,894 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 16:10:15,895 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 16:10:15,895 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 16:10:15,895 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 16:10:15,895 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-22 16:10:15,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 16:10:15,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 16:10:15,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 16:10:15,962 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 16:10:15,962 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 16:10:15,963 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 16:10:16,031 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0189eec98/5d5d79f6420b4a0bb8ceeefd2175a722/FLAG6cfad0076 [2018-10-22 16:10:16,443 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 16:10:16,444 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested_true-unreach-call_true-termination.i [2018-10-22 16:10:16,451 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0189eec98/5d5d79f6420b4a0bb8ceeefd2175a722/FLAG6cfad0076 [2018-10-22 16:10:16,469 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/0189eec98/5d5d79f6420b4a0bb8ceeefd2175a722 [2018-10-22 16:10:16,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 16:10:16,486 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 16:10:16,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 16:10:16,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 16:10:16,492 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 16:10:16,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60904c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16, skipping insertion in model container [2018-10-22 16:10:16,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 16:10:16,530 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 16:10:16,765 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:10:16,770 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 16:10:16,793 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 16:10:16,812 INFO L193 MainTranslator]: Completed translation [2018-10-22 16:10:16,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16 WrapperNode [2018-10-22 16:10:16,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 16:10:16,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 16:10:16,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 16:10:16,814 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 16:10:16,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 16:10:16,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 16:10:16,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 16:10:16,833 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 16:10:16,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (1/1) ... [2018-10-22 16:10:16,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 16:10:16,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 16:10:16,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 16:10:16,854 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 16:10:16,855 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (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 [2018-10-22 16:10:16,918 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 16:10:16,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 16:10:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 16:10:16,919 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 16:10:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 16:10:16,919 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 16:10:16,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 16:10:16,920 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 16:10:17,350 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 16:10:17,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:10:17 BoogieIcfgContainer [2018-10-22 16:10:17,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 16:10:17,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 16:10:17,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 16:10:17,356 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 16:10:17,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 04:10:16" (1/3) ... [2018-10-22 16:10:17,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@875ae37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:10:17, skipping insertion in model container [2018-10-22 16:10:17,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 04:10:16" (2/3) ... [2018-10-22 16:10:17,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@875ae37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 04:10:17, skipping insertion in model container [2018-10-22 16:10:17,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 04:10:17" (3/3) ... [2018-10-22 16:10:17,360 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call_true-termination.i [2018-10-22 16:10:17,368 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 16:10:17,376 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 16:10:17,391 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 16:10:17,423 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 16:10:17,424 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 16:10:17,424 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 16:10:17,424 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 16:10:17,424 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 16:10:17,424 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 16:10:17,425 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 16:10:17,425 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 16:10:17,425 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 16:10:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2018-10-22 16:10:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-22 16:10:17,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:17,455 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:17,460 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:17,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:17,467 INFO L82 PathProgramCache]: Analyzing trace with hash -702630595, now seen corresponding path program 1 times [2018-10-22 16:10:17,470 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:17,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:17,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:17,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:17,524 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:17,602 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:10:17,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 16:10:17,603 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:10:17,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 16:10:17,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 16:10:17,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 16:10:17,622 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2018-10-22 16:10:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:17,646 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2018-10-22 16:10:17,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 16:10:17,648 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-10-22 16:10:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:17,657 INFO L225 Difference]: With dead ends: 43 [2018-10-22 16:10:17,657 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 16:10:17,661 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 [2018-10-22 16:10:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 16:10:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 16:10:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 16:10:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-22 16:10:17,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2018-10-22 16:10:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:17,708 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-22 16:10:17,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 16:10:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-22 16:10:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 16:10:17,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:17,710 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:17,710 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:17,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:17,713 INFO L82 PathProgramCache]: Analyzing trace with hash -972126638, now seen corresponding path program 1 times [2018-10-22 16:10:17,713 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:17,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:17,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:17,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:17,715 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:17,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:10:17,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 16:10:17,902 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:10:17,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 16:10:17,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 16:10:17,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 16:10:17,906 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2018-10-22 16:10:18,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:18,071 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2018-10-22 16:10:18,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 16:10:18,073 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2018-10-22 16:10:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:18,074 INFO L225 Difference]: With dead ends: 29 [2018-10-22 16:10:18,074 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 16:10:18,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 16:10:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 16:10:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-22 16:10:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 16:10:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2018-10-22 16:10:18,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2018-10-22 16:10:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:18,085 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2018-10-22 16:10:18,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 16:10:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2018-10-22 16:10:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-22 16:10:18,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:18,086 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:18,087 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:18,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1998515670, now seen corresponding path program 1 times [2018-10-22 16:10:18,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:18,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:18,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:18,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:18,091 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:18,176 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:10:18,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 16:10:18,177 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:10:18,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 16:10:18,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 16:10:18,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 16:10:18,178 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2018-10-22 16:10:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:18,277 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2018-10-22 16:10:18,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 16:10:18,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2018-10-22 16:10:18,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:18,279 INFO L225 Difference]: With dead ends: 34 [2018-10-22 16:10:18,279 INFO L226 Difference]: Without dead ends: 23 [2018-10-22 16:10:18,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 16:10:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-22 16:10:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2018-10-22 16:10:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 16:10:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-22 16:10:18,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2018-10-22 16:10:18,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:18,286 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-22 16:10:18,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 16:10:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-22 16:10:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 16:10:18,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:18,287 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:18,287 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:18,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:18,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1293803971, now seen corresponding path program 1 times [2018-10-22 16:10:18,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:18,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:18,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:18,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:18,290 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:18,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:18,363 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:18,364 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-22 16:10:18,366 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [21], [25], [28], [30], [32], [36], [43], [46], [48], [54], [55], [56], [58] [2018-10-22 16:10:18,412 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 16:10:18,413 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 16:10:19,651 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 16:10:19,654 INFO L272 AbstractInterpreter]: Visited 19 different actions 599 times. Merged at 8 different actions 374 times. Widened at 3 different actions 105 times. Found 61 fixpoints after 6 different actions. Largest state had 10 variables. [2018-10-22 16:10:19,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:19,705 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 16:10:19,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:19,705 INFO L197 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 [2018-10-22 16:10:19,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:19,721 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:10:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:19,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:19,963 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:20,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:20,238 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:20,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:20,256 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:10:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:20,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:20,285 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:20,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:20,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 10 [2018-10-22 16:10:20,309 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:20,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 16:10:20,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 16:10:20,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:10:20,310 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 7 states. [2018-10-22 16:10:20,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:20,423 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2018-10-22 16:10:20,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 16:10:20,424 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-22 16:10:20,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:20,425 INFO L225 Difference]: With dead ends: 39 [2018-10-22 16:10:20,425 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 16:10:20,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-22 16:10:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 16:10:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-22 16:10:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 16:10:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-22 16:10:20,432 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-10-22 16:10:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:20,432 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-22 16:10:20,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 16:10:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-22 16:10:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-22 16:10:20,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:20,434 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:20,434 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:20,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:20,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1379909750, now seen corresponding path program 2 times [2018-10-22 16:10:20,435 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:20,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:20,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:20,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:20,436 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 16:10:20,538 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:20,538 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:20,538 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:20,539 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:20,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:20,539 INFO L197 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 [2018-10-22 16:10:20,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:10:20,550 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:20,565 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:10:20,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:20,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 16:10:20,823 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 16:10:20,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:20,903 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:20,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:10:20,918 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:20,943 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:10:20,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:20,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 16:10:20,955 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-22 16:10:20,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:20,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 5] total 12 [2018-10-22 16:10:20,981 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:20,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 16:10:20,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 16:10:20,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-10-22 16:10:20,983 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-10-22 16:10:21,408 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-22 16:10:21,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:21,747 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2018-10-22 16:10:21,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 16:10:21,750 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-10-22 16:10:21,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:21,751 INFO L225 Difference]: With dead ends: 73 [2018-10-22 16:10:21,751 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 16:10:21,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2018-10-22 16:10:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 16:10:21,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2018-10-22 16:10:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-22 16:10:21,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-22 16:10:21,760 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 24 [2018-10-22 16:10:21,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:21,761 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-22 16:10:21,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 16:10:21,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-22 16:10:21,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-22 16:10:21,762 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:21,763 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:21,763 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:21,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1699386968, now seen corresponding path program 3 times [2018-10-22 16:10:21,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:21,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:21,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:21,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:21,765 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 16:10:21,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:21,923 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:21,923 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:21,923 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:21,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:21,923 INFO L197 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) [2018-10-22 16:10:21,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:10:21,936 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:21,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 16:10:21,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:21,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 16:10:22,073 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:22,192 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 16:10:22,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:22,222 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:22,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:10:22,238 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:10:22,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-22 16:10:22,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:22,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 16:10:22,289 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2018-10-22 16:10:22,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:22,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6, 6, 6] total 15 [2018-10-22 16:10:22,305 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:22,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 16:10:22,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 16:10:22,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-10-22 16:10:22,306 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 11 states. [2018-10-22 16:10:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:22,967 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2018-10-22 16:10:22,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 16:10:22,968 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-10-22 16:10:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:22,970 INFO L225 Difference]: With dead ends: 106 [2018-10-22 16:10:22,970 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 16:10:22,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 16:10:22,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 16:10:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2018-10-22 16:10:22,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 16:10:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2018-10-22 16:10:22,984 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 41 [2018-10-22 16:10:22,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:22,984 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2018-10-22 16:10:22,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 16:10:22,985 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2018-10-22 16:10:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 16:10:22,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:22,987 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 12, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:22,987 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:22,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:22,988 INFO L82 PathProgramCache]: Analyzing trace with hash -319190378, now seen corresponding path program 4 times [2018-10-22 16:10:22,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:22,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:22,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:22,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:22,989 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 16:10:23,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:23,288 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:23,288 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:23,288 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:23,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:23,288 INFO L197 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 [2018-10-22 16:10:23,303 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 16:10:23,303 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 16:10:23,332 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 16:10:23,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:23,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 16:10:23,507 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 16:10:23,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:23,628 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:23,644 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 16:10:23,644 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 16:10:23,695 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 16:10:23,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:23,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 16:10:23,716 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:23,782 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 138 proven. 26 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2018-10-22 16:10:23,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:23,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-22 16:10:23,785 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:23,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 16:10:23,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 16:10:23,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 16:10:23,790 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 13 states. [2018-10-22 16:10:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:23,886 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2018-10-22 16:10:23,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 16:10:23,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2018-10-22 16:10:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:23,891 INFO L225 Difference]: With dead ends: 119 [2018-10-22 16:10:23,891 INFO L226 Difference]: Without dead ends: 77 [2018-10-22 16:10:23,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 16:10:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-22 16:10:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2018-10-22 16:10:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-22 16:10:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2018-10-22 16:10:23,915 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 64 [2018-10-22 16:10:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:23,915 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2018-10-22 16:10:23,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 16:10:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2018-10-22 16:10:23,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-22 16:10:23,926 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:23,926 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 15, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:23,927 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:23,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:23,927 INFO L82 PathProgramCache]: Analyzing trace with hash 414540755, now seen corresponding path program 5 times [2018-10-22 16:10:23,927 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:23,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:23,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:23,932 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 16:10:24,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:24,274 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:24,274 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:24,274 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:24,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:24,275 INFO L197 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 [2018-10-22 16:10:24,302 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 16:10:24,302 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:24,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 16:10:24,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:24,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 16:10:24,519 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 16:10:24,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:24,639 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:24,659 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 16:10:24,659 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:24,801 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-22 16:10:24,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:24,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 16:10:24,819 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:25,123 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 200 proven. 40 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-10-22 16:10:25,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:25,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-22 16:10:25,125 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:25,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 16:10:25,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 16:10:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 16:10:25,127 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 15 states. [2018-10-22 16:10:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:25,189 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2018-10-22 16:10:25,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 16:10:25,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2018-10-22 16:10:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:25,192 INFO L225 Difference]: With dead ends: 134 [2018-10-22 16:10:25,192 INFO L226 Difference]: Without dead ends: 86 [2018-10-22 16:10:25,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 277 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 16:10:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-22 16:10:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-22 16:10:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 16:10:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2018-10-22 16:10:25,206 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 73 [2018-10-22 16:10:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:25,206 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2018-10-22 16:10:25,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 16:10:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2018-10-22 16:10:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 16:10:25,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:25,208 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 18, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:25,208 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:25,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:25,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1138844106, now seen corresponding path program 6 times [2018-10-22 16:10:25,209 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:25,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:25,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:25,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:25,210 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 274 proven. 57 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2018-10-22 16:10:25,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:25,376 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:25,376 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:25,376 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:25,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:25,376 INFO L197 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 [2018-10-22 16:10:25,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 16:10:25,385 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 16:10:25,427 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 16:10:25,427 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:25,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 16:10:25,763 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 16:10:25,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:25,900 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:25,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 16:10:25,917 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 16:10:25,982 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-22 16:10:25,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:25,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 16:10:26,008 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2018-10-22 16:10:26,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:26,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7, 7, 7] total 20 [2018-10-22 16:10:26,074 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:26,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 16:10:26,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 16:10:26,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2018-10-22 16:10:26,075 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 15 states. [2018-10-22 16:10:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:27,278 INFO L93 Difference]: Finished difference Result 201 states and 214 transitions. [2018-10-22 16:10:27,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 16:10:27,278 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 82 [2018-10-22 16:10:27,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:27,280 INFO L225 Difference]: With dead ends: 201 [2018-10-22 16:10:27,280 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 16:10:27,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1143, Invalid=2397, Unknown=0, NotChecked=0, Total=3540 [2018-10-22 16:10:27,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 16:10:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2018-10-22 16:10:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-22 16:10:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2018-10-22 16:10:27,299 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 82 [2018-10-22 16:10:27,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:27,299 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2018-10-22 16:10:27,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 16:10:27,299 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2018-10-22 16:10:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-22 16:10:27,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:27,301 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 28, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:27,302 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:27,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash -293632002, now seen corresponding path program 7 times [2018-10-22 16:10:27,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:27,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:27,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:27,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:27,303 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 16:10:27,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:27,659 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:27,659 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:27,659 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:27,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:27,659 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:27,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:27,667 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:10:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:27,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 16:10:27,868 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 16:10:27,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:27,977 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:27,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:27,992 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:10:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:28,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 16:10:28,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1396 backedges. 539 proven. 77 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2018-10-22 16:10:28,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:28,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-22 16:10:28,165 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:28,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 16:10:28,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 16:10:28,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 16:10:28,166 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 19 states. [2018-10-22 16:10:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:28,330 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2018-10-22 16:10:28,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 16:10:28,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 117 [2018-10-22 16:10:28,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:28,334 INFO L225 Difference]: With dead ends: 220 [2018-10-22 16:10:28,335 INFO L226 Difference]: Without dead ends: 134 [2018-10-22 16:10:28,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 445 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 16:10:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-22 16:10:28,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-10-22 16:10:28,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-22 16:10:28,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2018-10-22 16:10:28,376 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 117 [2018-10-22 16:10:28,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:28,376 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2018-10-22 16:10:28,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 16:10:28,377 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2018-10-22 16:10:28,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-10-22 16:10:28,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:28,381 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 32, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:28,381 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:28,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:28,382 INFO L82 PathProgramCache]: Analyzing trace with hash -210025646, now seen corresponding path program 8 times [2018-10-22 16:10:28,382 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:28,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:28,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:28,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:28,383 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 16:10:28,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:28,555 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:28,555 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:28,556 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:28,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:28,556 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:28,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:10:28,565 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:28,616 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:10:28,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:28,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 16:10:28,803 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 16:10:28,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:28,953 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:28,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:10:28,972 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:29,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:10:29,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:29,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 16:10:29,104 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 686 proven. 100 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2018-10-22 16:10:29,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:29,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-22 16:10:29,297 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:29,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 16:10:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 16:10:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 16:10:29,299 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 21 states. [2018-10-22 16:10:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:29,415 INFO L93 Difference]: Finished difference Result 241 states and 252 transitions. [2018-10-22 16:10:29,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 16:10:29,415 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 129 [2018-10-22 16:10:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:29,417 INFO L225 Difference]: With dead ends: 241 [2018-10-22 16:10:29,417 INFO L226 Difference]: Without dead ends: 146 [2018-10-22 16:10:29,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 489 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 16:10:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-22 16:10:29,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 142. [2018-10-22 16:10:29,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-10-22 16:10:29,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2018-10-22 16:10:29,436 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 129 [2018-10-22 16:10:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:29,436 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2018-10-22 16:10:29,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 16:10:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2018-10-22 16:10:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-10-22 16:10:29,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:29,438 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 36, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:29,439 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:29,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:29,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1652018178, now seen corresponding path program 9 times [2018-10-22 16:10:29,439 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:29,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:29,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:29,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:29,440 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 851 proven. 126 refuted. 0 times theorem prover too weak. 1239 trivial. 0 not checked. [2018-10-22 16:10:29,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:29,608 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:29,608 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:29,608 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:29,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:29,608 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:29,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:10:29,617 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:10:29,648 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 16:10:29,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:29,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 854 proven. 126 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 16:10:29,792 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 11 proven. 969 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 16:10:30,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:30,115 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:30,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:10:30,133 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:10:30,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-22 16:10:30,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:30,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:30,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 854 proven. 126 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 16:10:30,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 11 proven. 969 refuted. 0 times theorem prover too weak. 1236 trivial. 0 not checked. [2018-10-22 16:10:30,402 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:30,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-22 16:10:30,402 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:30,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 16:10:30,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 16:10:30,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 16:10:30,404 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 23 states. [2018-10-22 16:10:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:30,590 INFO L93 Difference]: Finished difference Result 262 states and 273 transitions. [2018-10-22 16:10:30,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 16:10:30,590 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 141 [2018-10-22 16:10:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:30,591 INFO L225 Difference]: With dead ends: 262 [2018-10-22 16:10:30,591 INFO L226 Difference]: Without dead ends: 158 [2018-10-22 16:10:30,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 532 SyntacticMatches, 22 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-10-22 16:10:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-10-22 16:10:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2018-10-22 16:10:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-10-22 16:10:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2018-10-22 16:10:30,609 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 141 [2018-10-22 16:10:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:30,609 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2018-10-22 16:10:30,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 16:10:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2018-10-22 16:10:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-22 16:10:30,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:30,612 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 40, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:30,612 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:30,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:30,612 INFO L82 PathProgramCache]: Analyzing trace with hash -969563822, now seen corresponding path program 10 times [2018-10-22 16:10:30,612 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:30,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:30,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:30,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:30,614 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 16:10:30,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:30,891 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:30,891 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:30,891 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:30,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:30,891 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:30,900 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 16:10:30,900 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 16:10:30,948 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 16:10:30,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:30,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 16:10:31,128 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 16:10:31,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:31,440 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:31,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 16:10:31,457 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 16:10:31,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 16:10:31,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:31,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 16:10:31,629 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2698 backedges. 0 proven. 2078 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2018-10-22 16:10:31,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:31,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8] total 19 [2018-10-22 16:10:31,721 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:31,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 16:10:31,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 16:10:31,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 16:10:31,723 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 13 states. [2018-10-22 16:10:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:31,827 INFO L93 Difference]: Finished difference Result 227 states and 233 transitions. [2018-10-22 16:10:31,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 16:10:31,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2018-10-22 16:10:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:31,829 INFO L225 Difference]: With dead ends: 227 [2018-10-22 16:10:31,829 INFO L226 Difference]: Without dead ends: 222 [2018-10-22 16:10:31,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-10-22 16:10:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2018-10-22 16:10:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 189. [2018-10-22 16:10:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-22 16:10:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 194 transitions. [2018-10-22 16:10:31,849 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 194 transitions. Word has length 153 [2018-10-22 16:10:31,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:31,850 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 194 transitions. [2018-10-22 16:10:31,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 16:10:31,850 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 194 transitions. [2018-10-22 16:10:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-22 16:10:31,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:31,852 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 50, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:31,853 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:31,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:31,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1779605514, now seen corresponding path program 11 times [2018-10-22 16:10:31,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:31,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:31,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:31,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:31,854 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 16:10:32,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:32,498 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:32,498 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:32,498 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:32,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:32,498 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:32,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 16:10:32,505 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:32,585 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-22 16:10:32,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:32,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 16:10:32,775 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 16:10:33,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:33,174 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:33,189 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 16:10:33,190 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:33,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-22 16:10:33,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:33,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 16:10:33,917 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 0 proven. 3460 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2018-10-22 16:10:33,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:33,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 20 [2018-10-22 16:10:33,996 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:33,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 16:10:33,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 16:10:33,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 16:10:33,997 INFO L87 Difference]: Start difference. First operand 189 states and 194 transitions. Second operand 15 states. [2018-10-22 16:10:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:34,321 INFO L93 Difference]: Finished difference Result 262 states and 269 transitions. [2018-10-22 16:10:34,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 16:10:34,321 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 188 [2018-10-22 16:10:34,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:34,323 INFO L225 Difference]: With dead ends: 262 [2018-10-22 16:10:34,323 INFO L226 Difference]: Without dead ends: 257 [2018-10-22 16:10:34,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 737 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=225, Unknown=0, NotChecked=0, Total=380 [2018-10-22 16:10:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-10-22 16:10:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 224. [2018-10-22 16:10:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-22 16:10:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 230 transitions. [2018-10-22 16:10:34,343 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 230 transitions. Word has length 188 [2018-10-22 16:10:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:34,343 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 230 transitions. [2018-10-22 16:10:34,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 16:10:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 230 transitions. [2018-10-22 16:10:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-22 16:10:34,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:34,346 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 60, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:34,347 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:34,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash 388824786, now seen corresponding path program 12 times [2018-10-22 16:10:34,347 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:34,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:34,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:34,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:34,348 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 16:10:35,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:35,476 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:35,476 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:35,476 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:35,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:35,476 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:35,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 16:10:35,485 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 16:10:35,693 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 16:10:35,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:35,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 16:10:35,905 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 16:10:36,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:36,104 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:36,120 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 16:10:36,120 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder MIX_INSIDE_OUTSIDE (IT: FPandBP) [2018-10-22 16:10:36,810 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 16:10:36,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:36,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 16:10:36,896 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6117 backedges. 0 proven. 5187 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2018-10-22 16:10:37,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:37,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10] total 21 [2018-10-22 16:10:37,004 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:37,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 16:10:37,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 16:10:37,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-22 16:10:37,005 INFO L87 Difference]: Start difference. First operand 224 states and 230 transitions. Second operand 17 states. [2018-10-22 16:10:37,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:37,159 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2018-10-22 16:10:37,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 16:10:37,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 223 [2018-10-22 16:10:37,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:37,161 INFO L225 Difference]: With dead ends: 297 [2018-10-22 16:10:37,161 INFO L226 Difference]: Without dead ends: 292 [2018-10-22 16:10:37,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 873 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=251, Unknown=0, NotChecked=0, Total=420 [2018-10-22 16:10:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-22 16:10:37,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 259. [2018-10-22 16:10:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-22 16:10:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 266 transitions. [2018-10-22 16:10:37,184 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 266 transitions. Word has length 223 [2018-10-22 16:10:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:37,185 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 266 transitions. [2018-10-22 16:10:37,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 16:10:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 266 transitions. [2018-10-22 16:10:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-22 16:10:37,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:37,189 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 70, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:37,189 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:37,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1062399370, now seen corresponding path program 13 times [2018-10-22 16:10:37,190 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:37,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:37,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:37,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:37,191 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 16:10:37,520 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:37,520 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:37,520 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:37,521 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:37,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:37,521 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:37,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:37,555 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:10:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:37,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 16:10:38,196 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 16:10:38,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:38,376 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:38,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:38,392 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 16:10:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:38,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 16:10:38,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8344 backedges. 0 proven. 7259 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2018-10-22 16:10:39,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:39,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11] total 22 [2018-10-22 16:10:39,753 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:39,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 16:10:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 16:10:39,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 16:10:39,755 INFO L87 Difference]: Start difference. First operand 259 states and 266 transitions. Second operand 19 states. [2018-10-22 16:10:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:39,867 INFO L93 Difference]: Finished difference Result 332 states and 341 transitions. [2018-10-22 16:10:39,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 16:10:39,868 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 258 [2018-10-22 16:10:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:39,870 INFO L225 Difference]: With dead ends: 332 [2018-10-22 16:10:39,870 INFO L226 Difference]: Without dead ends: 327 [2018-10-22 16:10:39,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 1009 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2018-10-22 16:10:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-22 16:10:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 294. [2018-10-22 16:10:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2018-10-22 16:10:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 302 transitions. [2018-10-22 16:10:39,902 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 302 transitions. Word has length 258 [2018-10-22 16:10:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:39,902 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 302 transitions. [2018-10-22 16:10:39,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 16:10:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 302 transitions. [2018-10-22 16:10:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2018-10-22 16:10:39,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:39,904 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 80, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:39,905 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:39,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash -790873006, now seen corresponding path program 14 times [2018-10-22 16:10:39,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:39,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:39,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 16:10:39,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:39,906 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 16:10:40,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:40,359 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:40,359 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:40,359 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:40,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:40,359 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:40,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:10:40,367 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:40,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:10:40,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:40,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 16:10:41,044 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 16:10:41,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:41,267 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:41,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 16:10:41,290 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 16:10:41,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 16:10:41,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:41,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 16:10:41,621 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10916 backedges. 0 proven. 9676 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-22 16:10:41,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:41,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12] total 23 [2018-10-22 16:10:41,859 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:41,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 16:10:41,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 16:10:41,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 16:10:41,861 INFO L87 Difference]: Start difference. First operand 294 states and 302 transitions. Second operand 21 states. [2018-10-22 16:10:41,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:41,986 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2018-10-22 16:10:41,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 16:10:41,987 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 293 [2018-10-22 16:10:41,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:41,989 INFO L225 Difference]: With dead ends: 367 [2018-10-22 16:10:41,989 INFO L226 Difference]: Without dead ends: 362 [2018-10-22 16:10:41,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1182 GetRequests, 1145 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2018-10-22 16:10:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2018-10-22 16:10:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 329. [2018-10-22 16:10:42,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-10-22 16:10:42,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 338 transitions. [2018-10-22 16:10:42,018 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 338 transitions. Word has length 293 [2018-10-22 16:10:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:42,019 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 338 transitions. [2018-10-22 16:10:42,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 16:10:42,019 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 338 transitions. [2018-10-22 16:10:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-22 16:10:42,021 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:42,021 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 90, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:42,021 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:42,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 547939574, now seen corresponding path program 15 times [2018-10-22 16:10:42,022 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:42,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:42,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:42,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:42,023 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 16:10:42,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:42,404 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 16:10:42,404 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 16:10:42,405 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 16:10:42,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:42,405 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 16:10:42,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:10:42,412 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:10:42,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-22 16:10:42,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:42,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 16:10:42,894 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 16:10:43,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 16:10:43,119 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 16:10:43,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 16:10:43,135 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 16:10:45,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-22 16:10:45,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 16:10:45,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 16:10:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 16:10:45,281 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 16:10:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13833 backedges. 0 proven. 12438 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2018-10-22 16:10:45,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 16:10:45,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13] total 23 [2018-10-22 16:10:45,627 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 16:10:45,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 16:10:45,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 16:10:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-22 16:10:45,629 INFO L87 Difference]: Start difference. First operand 329 states and 338 transitions. Second operand 23 states. [2018-10-22 16:10:46,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:46,348 INFO L93 Difference]: Finished difference Result 402 states and 413 transitions. [2018-10-22 16:10:46,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 16:10:46,349 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 328 [2018-10-22 16:10:46,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:46,351 INFO L225 Difference]: With dead ends: 402 [2018-10-22 16:10:46,352 INFO L226 Difference]: Without dead ends: 397 [2018-10-22 16:10:46,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 1324 GetRequests, 1280 SyntacticMatches, 22 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2018-10-22 16:10:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2018-10-22 16:10:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 364. [2018-10-22 16:10:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-22 16:10:46,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 374 transitions. [2018-10-22 16:10:46,404 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 374 transitions. Word has length 328 [2018-10-22 16:10:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:46,406 INFO L481 AbstractCegarLoop]: Abstraction has 364 states and 374 transitions. [2018-10-22 16:10:46,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 16:10:46,406 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 374 transitions. [2018-10-22 16:10:46,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-22 16:10:46,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 16:10:46,409 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 100, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 16:10:46,409 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 16:10:46,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 16:10:46,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1390107090, now seen corresponding path program 16 times [2018-10-22 16:10:46,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 16:10:46,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:46,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 16:10:46,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 16:10:46,412 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 16:10:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 16:10:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17095 backedges. 17077 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-22 16:10:53,304 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 16:10:53,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2018-10-22 16:10:53,304 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 16:10:53,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-22 16:10:53,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-22 16:10:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5257, Invalid=5663, Unknown=0, NotChecked=0, Total=10920 [2018-10-22 16:10:53,309 INFO L87 Difference]: Start difference. First operand 364 states and 374 transitions. Second operand 105 states. [2018-10-22 16:10:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 16:10:56,418 INFO L93 Difference]: Finished difference Result 14899 states and 15359 transitions. [2018-10-22 16:10:56,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-22 16:10:56,418 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 363 [2018-10-22 16:10:56,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 16:10:56,419 INFO L225 Difference]: With dead ends: 14899 [2018-10-22 16:10:56,419 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 16:10:56,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=5261, Invalid=5869, Unknown=0, NotChecked=0, Total=11130 [2018-10-22 16:10:56,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 16:10:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 16:10:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 16:10:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 16:10:56,446 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 363 [2018-10-22 16:10:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 16:10:56,446 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 16:10:56,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-22 16:10:56,446 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 16:10:56,446 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 16:10:56,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 16:10:58,597 WARN L179 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-22 16:11:04,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:04,944 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:04,955 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:04,972 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:04,988 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,122 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,155 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,211 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,386 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,506 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,575 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,620 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,644 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,683 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,827 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,837 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:05,988 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,000 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,018 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,163 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,329 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,355 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,374 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,381 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,389 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,593 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,689 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:06,802 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:07,140 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:07,168 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:07,463 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:07,494 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,109 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,222 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,357 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,449 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,491 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,533 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:08,803 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,053 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,177 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,231 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,350 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,427 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,618 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,636 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,908 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:09,958 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:10,026 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:10,174 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:10,236 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:10,535 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:10,714 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:10,749 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:10,779 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,013 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,223 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,268 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,279 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,376 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,577 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,598 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,746 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,800 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:11,823 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,294 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,356 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,574 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,582 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,598 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,850 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:12,907 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:13,059 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:13,086 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:13,153 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:13,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:13,804 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,071 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,088 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,107 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,182 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,388 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,529 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,664 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:14,839 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:15,208 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:15,438 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:15,555 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:15,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:15,753 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:15,824 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:16,073 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:16,113 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:16,450 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:16,464 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:16,901 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:17,057 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:17,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:17,633 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:17,665 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:18,278 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:19,987 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:20,869 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:20,898 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:21,028 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:21,434 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:21,709 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:21,867 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:22,108 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:22,540 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:22,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:23,528 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:24,096 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:24,700 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:26,346 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:26,409 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:27,323 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:27,687 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:27,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:28,335 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:29,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:30,428 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:32,349 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:32,753 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:35,409 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:36,980 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:43,383 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:43,706 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:48,444 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:49,340 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:52,255 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:52,790 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:11:55,682 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:12:00,078 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:12:01,320 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:12:02,436 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:12:07,672 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:12:11,033 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-22 16:12:17,567 WARN L179 SmtUtils]: Spent 1.32 m on a formula simplification. DAG size of input: 5154 DAG size of output: 1799 [2018-10-22 16:12:25,011 WARN L179 SmtUtils]: Spent 7.42 s on a formula simplification. DAG size of input: 664 DAG size of output: 59 [2018-10-22 16:13:29,363 WARN L179 SmtUtils]: Spent 1.07 m on a formula simplification. DAG size of input: 1775 DAG size of output: 363 [2018-10-22 16:13:29,367 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 16:13:29,367 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:13:29,367 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 16:13:29,367 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 16:13:29,367 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 16:13:29,367 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 16:13:29,367 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 24) no Hoare annotation was computed. [2018-10-22 16:13:29,368 INFO L425 ceAbstractionStarter]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2018-10-22 16:13:29,368 INFO L425 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2018-10-22 16:13:29,368 INFO L425 ceAbstractionStarter]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2018-10-22 16:13:29,368 INFO L421 ceAbstractionStarter]: At program point L17-4(lines 17 21) the Hoare annotation is: (let ((.cse0 (<= 10 main_~m~0)) (.cse1 (<= 10 main_~n~0))) (or (and (<= 30 main_~k~0) (<= main_~i~0 3) .cse0 .cse1) (and .cse0 (<= 100 main_~k~0) .cse1) (and .cse0 (<= 40 main_~k~0) (<= main_~i~0 4) .cse1) (and .cse0 (<= 0 main_~k~0) (<= main_~i~0 0) .cse1) (and .cse0 (<= 60 main_~k~0) (<= main_~i~0 6) .cse1) (and .cse0 (<= 10 main_~k~0) (<= main_~i~0 1) .cse1) (and (<= 80 main_~k~0) .cse0 (<= main_~i~0 8) .cse1) (and (<= 50 main_~k~0) .cse0 (<= main_~i~0 5) .cse1) (and .cse0 (<= main_~i~0 9) .cse1 (<= 90 main_~k~0)) (and (<= 70 main_~k~0) .cse0 (<= main_~i~0 7) .cse1) (and .cse0 (<= 20 main_~k~0) (<= main_~i~0 2) .cse1))) [2018-10-22 16:13:29,368 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 24) no Hoare annotation was computed. [2018-10-22 16:13:29,368 INFO L421 ceAbstractionStarter]: At program point L17-5(lines 17 21) the Hoare annotation is: (and (<= 10 main_~m~0) (<= 100 main_~k~0) (<= 10 main_~n~0)) [2018-10-22 16:13:29,368 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 24) the Hoare annotation is: true [2018-10-22 16:13:29,369 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-10-22 16:13:29,369 INFO L425 ceAbstractionStarter]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2018-10-22 16:13:29,369 INFO L425 ceAbstractionStarter]: For program point L16(line 16) no Hoare annotation was computed. [2018-10-22 16:13:29,369 INFO L425 ceAbstractionStarter]: For program point L18-3(lines 18 20) no Hoare annotation was computed. [2018-10-22 16:13:29,370 INFO L421 ceAbstractionStarter]: At program point L18-4(lines 18 20) the Hoare annotation is: (let ((.cse4 (<= main_~j~0 5)) (.cse0 (<= 10 main_~m~0)) (.cse32 (<= main_~j~0 6))) (let ((.cse14 (<= main_~j~0 8)) (.cse21 (<= main_~j~0 2)) (.cse25 (<= main_~j~0 3)) (.cse2 (<= main_~j~0 9)) (.cse38 (<= main_~j~0 1)) (.cse18 (<= main_~j~0 4)) (.cse11 (<= main_~j~0 0)) (.cse40 (and .cse0 .cse32)) (.cse36 (and .cse4 .cse0)) (.cse3 (<= 10 main_~n~0))) (let ((.cse30 (<= 80 main_~k~0)) (.cse22 (<= 70 main_~k~0)) (.cse28 (and .cse36 .cse3)) (.cse16 (and .cse40 .cse3)) (.cse27 (<= 60 main_~k~0)) (.cse31 (and .cse0 .cse11)) (.cse37 (<= 20 main_~k~0)) (.cse29 (and .cse0 .cse18)) (.cse23 (<= main_~i~0 5)) (.cse13 (and .cse0 .cse38 .cse3)) (.cse12 (<= main_~i~0 8)) (.cse39 (<= 90 main_~k~0)) (.cse9 (<= 10 main_~k~0)) (.cse35 (<= 50 main_~k~0)) (.cse17 (<= main_~i~0 7)) (.cse26 (and .cse0 .cse2)) (.cse33 (and .cse0 .cse25 .cse3)) (.cse34 (<= 30 main_~k~0)) (.cse19 (<= main_~i~0 0)) (.cse20 (<= main_~i~0 3)) (.cse5 (and .cse0 .cse21 .cse3)) (.cse10 (<= main_~i~0 1)) (.cse1 (<= main_~i~0 2)) (.cse8 (<= main_~j~0 7)) (.cse24 (and .cse14 .cse0)) (.cse6 (<= main_~i~0 6)) (.cse7 (<= (+ main_~i~0 1) main_~n~0)) (.cse41 (<= 40 main_~k~0)) (.cse15 (<= main_~i~0 4))) (or (and .cse0 (<= 29 main_~k~0) .cse1 .cse2 .cse3) (and .cse4 .cse0 (<= 25 main_~k~0) .cse1 .cse3) (and (<= 62 main_~k~0) .cse5 .cse6) (and (and .cse7 .cse0 .cse8 .cse3) (<= 97 main_~k~0)) (and .cse0 .cse9 .cse10 .cse11 .cse3) (and (<= 81 main_~k~0) .cse12 .cse13) (and .cse5 (<= 82 main_~k~0) .cse12) (and .cse14 .cse0 .cse15 (<= 48 main_~k~0) .cse3) (and .cse16 .cse17 (<= 76 main_~k~0)) (and .cse0 .cse15 .cse18 (<= 44 main_~k~0) .cse3) (and .cse0 (<= 7 main_~k~0) .cse8 .cse19 .cse3) (and .cse4 .cse0 (<= 45 main_~k~0) .cse15 .cse3) (and .cse20 .cse0 .cse21 (<= 32 main_~k~0) .cse3) (and .cse22 .cse0 .cse6 .cse3) (and (<= 2 main_~k~0) .cse0 .cse21 .cse19 .cse3) (and .cse23 .cse13 (<= 51 main_~k~0)) (and (<= 58 main_~k~0) .cse23 .cse3 .cse24) (and .cse0 .cse25 .cse15 (<= 43 main_~k~0) .cse3) (and (<= 89 main_~k~0) .cse26 .cse12 .cse3) (and (<= 66 main_~k~0) .cse16 .cse6) (and .cse0 .cse27 .cse23 .cse3) (and (<= 95 main_~k~0) (and .cse7 .cse28)) (and .cse0 .cse10 (<= 17 main_~k~0) .cse8 .cse3) (and (<= 33 main_~k~0) .cse20 .cse0 .cse25 .cse3) (and .cse29 (<= 74 main_~k~0) .cse17 .cse3) (and .cse30 .cse31 .cse12 .cse3) (and .cse0 .cse1 .cse18 .cse3 (<= 24 main_~k~0)) (and .cse14 .cse0 (<= 8 main_~k~0) .cse19 .cse3) (and (<= 23 main_~k~0) .cse0 .cse25 .cse1 .cse3) (and .cse0 .cse15 .cse2 (<= 49 main_~k~0) .cse3) (and (<= 86 main_~k~0) .cse16 .cse12) (and .cse5 .cse17 (<= 72 main_~k~0)) (and .cse12 .cse3 .cse24 (<= 88 main_~k~0)) (and .cse0 (<= 26 main_~k~0) .cse1 .cse3 .cse32) (and (and .cse29 .cse7 .cse3) (<= 94 main_~k~0)) (and .cse13 .cse15 (<= 41 main_~k~0)) (and .cse33 .cse17 (<= 73 main_~k~0)) (and .cse0 .cse25 (<= 3 main_~k~0) .cse19 .cse3) (and .cse34 .cse0 .cse1 .cse3) (and .cse30 .cse0 .cse17 .cse3) (and .cse0 .cse18 .cse19 (<= 4 main_~k~0) .cse3) (and .cse26 .cse17 (<= 79 main_~k~0) .cse3) (and (<= 37 main_~k~0) .cse20 .cse0 .cse8 .cse3) (and .cse0 .cse23 .cse8 .cse3 (<= 57 main_~k~0)) (and (<= 93 main_~k~0) (and .cse7 .cse33)) (and .cse20 .cse0 (<= 36 main_~k~0) .cse3 .cse32) (and (<= 64 main_~k~0) .cse29 .cse6 .cse3) (and .cse35 .cse23 .cse3 .cse31) (and .cse22 .cse31 .cse17 .cse3) (and .cse0 .cse15 (<= 46 main_~k~0) .cse3 .cse32) (and (<= 85 main_~k~0) .cse12 .cse28) (and (<= 16 main_~k~0) .cse0 .cse10 .cse3 .cse32) (and (<= 59 main_~k~0) .cse23 .cse26 .cse3) (and .cse0 (<= 0 main_~k~0) .cse11 .cse19 .cse3) (and (<= 75 main_~k~0) .cse36 .cse17 .cse3) (and .cse20 .cse0 .cse18 (<= 34 main_~k~0) .cse3) (and .cse0 .cse10 .cse21 (<= 12 main_~k~0) .cse3) (and (<= 96 main_~k~0) (and .cse7 .cse16)) (and .cse0 .cse37 .cse1 .cse11 .cse3) (and .cse6 .cse13 (<= 61 main_~k~0)) (and (<= 54 main_~k~0) .cse0 .cse23 .cse18 .cse3) (and (<= 91 main_~k~0) (and .cse7 .cse13)) (and .cse14 (<= 28 main_~k~0) .cse0 .cse1 .cse3) (and .cse0 (<= 6 main_~k~0) .cse19 .cse3 .cse32) (and .cse20 .cse4 .cse0 (<= 35 main_~k~0) .cse3) (and .cse23 (<= 52 main_~k~0) .cse5) (and .cse0 .cse10 .cse2 .cse3 (<= 19 main_~k~0)) (and .cse4 .cse0 (<= 15 main_~k~0) .cse10 .cse3) (and (<= 53 main_~k~0) .cse0 .cse25 .cse23 .cse3) (and .cse0 (<= 9 main_~k~0) .cse2 .cse19 .cse3) (and (<= 21 main_~k~0) .cse0 .cse38 .cse1 .cse3) (and .cse27 .cse6 .cse3 .cse31) (and .cse20 .cse0 (<= 39 main_~k~0) .cse2 .cse3) (and (and .cse7 .cse31 .cse3) .cse39) (and (<= 83 main_~k~0) .cse33 .cse12) (and .cse0 .cse12 .cse8 (<= 87 main_~k~0) .cse3) (and .cse0 .cse25 .cse10 (<= 13 main_~k~0) .cse3) (and .cse0 .cse37 .cse10 .cse3) (and .cse0 .cse15 (<= 47 main_~k~0) .cse8 .cse3) (and (<= 69 main_~k~0) .cse26 .cse6 .cse3) (and .cse36 (<= 55 main_~k~0) .cse23 .cse3) (and .cse29 (<= 84 main_~k~0) .cse12 .cse3) (and (<= 56 main_~k~0) .cse23 .cse40 .cse3) (and .cse0 .cse15 .cse21 (<= 42 main_~k~0) .cse3) (and (<= 67 main_~k~0) .cse0 .cse8 .cse6 .cse3) (and (<= 71 main_~k~0) .cse13 .cse17) (and .cse0 .cse12 .cse3 .cse39) (and .cse20 .cse0 .cse41 .cse3) (and .cse14 .cse0 (<= 18 main_~k~0) .cse10 .cse3) (and .cse0 .cse9 .cse19 .cse3) (and .cse0 .cse8 .cse17 (<= 77 main_~k~0) .cse3) (and .cse35 .cse0 .cse15 .cse3) (and (<= 78 main_~k~0) .cse17 .cse3 .cse24) (and (<= 99 main_~k~0) (and .cse7 .cse26 .cse3)) (and .cse0 .cse38 .cse19 .cse3 (<= 1 main_~k~0)) (and .cse20 .cse0 .cse38 .cse3 (<= 31 main_~k~0)) (and .cse0 (<= 22 main_~k~0) .cse1 .cse21 .cse3) (and .cse33 (<= 63 main_~k~0) .cse6) (and (<= 68 main_~k~0) .cse6 .cse3 .cse24) (and (<= 11 main_~k~0) .cse0 .cse38 .cse10 .cse3) (and .cse34 .cse20 .cse0 .cse11 .cse3) (and .cse4 .cse0 (<= 5 main_~k~0) .cse19 .cse3) (and .cse20 .cse14 .cse0 (<= 38 main_~k~0) .cse3) (and (and .cse5 .cse7) (<= 92 main_~k~0)) (and (<= 14 main_~k~0) .cse0 .cse10 .cse18 .cse3) (and .cse0 .cse1 .cse8 .cse3 (<= 27 main_~k~0)) (and (and .cse7 .cse3 .cse24) (<= 98 main_~k~0)) (and .cse36 (<= 65 main_~k~0) .cse6 .cse3) (and (and .cse7 .cse0 .cse3) (<= 100 main_~k~0)) (and .cse0 .cse41 .cse15 .cse11 .cse3))))) [2018-10-22 16:13:29,370 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 16:13:29,370 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 16:13:29,370 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 16:13:29,371 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 16:13:29,371 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 16:13:29,371 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 16:13:29,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 04:13:29 BoogieIcfgContainer [2018-10-22 16:13:29,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 16:13:29,411 INFO L168 Benchmark]: Toolchain (without parser) took 192926.53 ms. Allocated memory was 1.5 GB in the beginning and 4.1 GB in the end (delta: 2.6 GB). Free memory was 1.4 GB in the beginning and 2.7 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-10-22 16:13:29,412 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 16:13:29,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.29 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. [2018-10-22 16:13:29,413 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.88 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. [2018-10-22 16:13:29,414 INFO L168 Benchmark]: Boogie Preprocessor took 21.25 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. [2018-10-22 16:13:29,414 INFO L168 Benchmark]: RCFGBuilder took 497.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.0 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. [2018-10-22 16:13:29,415 INFO L168 Benchmark]: TraceAbstraction took 192057.79 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.2 GB in the beginning and 2.7 GB in the end (delta: -500.1 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2018-10-22 16:13:29,419 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 325.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 18.88 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 21.25 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 497.65 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 734.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -795.0 MB). Peak memory consumption was 26.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 192057.79 ms. Allocated memory was 2.3 GB in the beginning and 4.1 GB in the end (delta: 1.8 GB). Free memory was 2.2 GB in the beginning and 2.7 GB in the end (delta: -500.1 MB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((((((((((((30 <= k && i <= 3) && 10 <= m) && 10 <= n) || ((10 <= m && 100 <= k) && 10 <= n)) || (((10 <= m && 40 <= k) && i <= 4) && 10 <= n)) || (((10 <= m && 0 <= k) && i <= 0) && 10 <= n)) || (((10 <= m && 60 <= k) && i <= 6) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 1) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 8) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 5) && 10 <= n)) || (((10 <= m && i <= 9) && 10 <= n) && 90 <= k)) || (((70 <= k && 10 <= m) && i <= 7) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 2) && 10 <= n) - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((10 <= m && 29 <= k) && i <= 2) && j <= 9) && 10 <= n) || ((((j <= 5 && 10 <= m) && 25 <= k) && i <= 2) && 10 <= n)) || ((62 <= k && (10 <= m && j <= 2) && 10 <= n) && i <= 6)) || ((((i + 1 <= n && 10 <= m) && j <= 7) && 10 <= n) && 97 <= k)) || ((((10 <= m && 10 <= k) && i <= 1) && j <= 0) && 10 <= n)) || ((81 <= k && i <= 8) && (10 <= m && j <= 1) && 10 <= n)) || ((((10 <= m && j <= 2) && 10 <= n) && 82 <= k) && i <= 8)) || ((((j <= 8 && 10 <= m) && i <= 4) && 48 <= k) && 10 <= n)) || ((((10 <= m && j <= 6) && 10 <= n) && i <= 7) && 76 <= k)) || ((((10 <= m && i <= 4) && j <= 4) && 44 <= k) && 10 <= n)) || ((((10 <= m && 7 <= k) && j <= 7) && i <= 0) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 45 <= k) && i <= 4) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 2) && 32 <= k) && 10 <= n)) || (((70 <= k && 10 <= m) && i <= 6) && 10 <= n)) || ((((2 <= k && 10 <= m) && j <= 2) && i <= 0) && 10 <= n)) || ((i <= 5 && (10 <= m && j <= 1) && 10 <= n) && 51 <= k)) || (((58 <= k && i <= 5) && 10 <= n) && j <= 8 && 10 <= m)) || ((((10 <= m && j <= 3) && i <= 4) && 43 <= k) && 10 <= n)) || (((89 <= k && 10 <= m && j <= 9) && i <= 8) && 10 <= n)) || ((66 <= k && (10 <= m && j <= 6) && 10 <= n) && i <= 6)) || (((10 <= m && 60 <= k) && i <= 5) && 10 <= n)) || (95 <= k && i + 1 <= n && (j <= 5 && 10 <= m) && 10 <= n)) || ((((10 <= m && i <= 1) && 17 <= k) && j <= 7) && 10 <= n)) || ((((33 <= k && i <= 3) && 10 <= m) && j <= 3) && 10 <= n)) || ((((10 <= m && j <= 4) && 74 <= k) && i <= 7) && 10 <= n)) || (((80 <= k && 10 <= m && j <= 0) && i <= 8) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 4) && 10 <= n) && 24 <= k)) || ((((j <= 8 && 10 <= m) && 8 <= k) && i <= 0) && 10 <= n)) || ((((23 <= k && 10 <= m) && j <= 3) && i <= 2) && 10 <= n)) || ((((10 <= m && i <= 4) && j <= 9) && 49 <= k) && 10 <= n)) || ((86 <= k && (10 <= m && j <= 6) && 10 <= n) && i <= 8)) || ((((10 <= m && j <= 2) && 10 <= n) && i <= 7) && 72 <= k)) || (((i <= 8 && 10 <= n) && j <= 8 && 10 <= m) && 88 <= k)) || ((((10 <= m && 26 <= k) && i <= 2) && 10 <= n) && j <= 6)) || ((((10 <= m && j <= 4) && i + 1 <= n) && 10 <= n) && 94 <= k)) || ((((10 <= m && j <= 1) && 10 <= n) && i <= 4) && 41 <= k)) || ((((10 <= m && j <= 3) && 10 <= n) && i <= 7) && 73 <= k)) || ((((10 <= m && j <= 3) && 3 <= k) && i <= 0) && 10 <= n)) || (((30 <= k && 10 <= m) && i <= 2) && 10 <= n)) || (((80 <= k && 10 <= m) && i <= 7) && 10 <= n)) || ((((10 <= m && j <= 4) && i <= 0) && 4 <= k) && 10 <= n)) || ((((10 <= m && j <= 9) && i <= 7) && 79 <= k) && 10 <= n)) || ((((37 <= k && i <= 3) && 10 <= m) && j <= 7) && 10 <= n)) || ((((10 <= m && i <= 5) && j <= 7) && 10 <= n) && 57 <= k)) || (93 <= k && i + 1 <= n && (10 <= m && j <= 3) && 10 <= n)) || ((((i <= 3 && 10 <= m) && 36 <= k) && 10 <= n) && j <= 6)) || (((64 <= k && 10 <= m && j <= 4) && i <= 6) && 10 <= n)) || (((50 <= k && i <= 5) && 10 <= n) && 10 <= m && j <= 0)) || (((70 <= k && 10 <= m && j <= 0) && i <= 7) && 10 <= n)) || ((((10 <= m && i <= 4) && 46 <= k) && 10 <= n) && j <= 6)) || ((85 <= k && i <= 8) && (j <= 5 && 10 <= m) && 10 <= n)) || ((((16 <= k && 10 <= m) && i <= 1) && 10 <= n) && j <= 6)) || (((59 <= k && i <= 5) && 10 <= m && j <= 9) && 10 <= n)) || ((((10 <= m && 0 <= k) && j <= 0) && i <= 0) && 10 <= n)) || (((75 <= k && j <= 5 && 10 <= m) && i <= 7) && 10 <= n)) || ((((i <= 3 && 10 <= m) && j <= 4) && 34 <= k) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 2) && 12 <= k) && 10 <= n)) || (96 <= k && i + 1 <= n && (10 <= m && j <= 6) && 10 <= n)) || ((((10 <= m && 20 <= k) && i <= 2) && j <= 0) && 10 <= n)) || ((i <= 6 && (10 <= m && j <= 1) && 10 <= n) && 61 <= k)) || ((((54 <= k && 10 <= m) && i <= 5) && j <= 4) && 10 <= n)) || (91 <= k && i + 1 <= n && (10 <= m && j <= 1) && 10 <= n)) || ((((j <= 8 && 28 <= k) && 10 <= m) && i <= 2) && 10 <= n)) || ((((10 <= m && 6 <= k) && i <= 0) && 10 <= n) && j <= 6)) || ((((i <= 3 && j <= 5) && 10 <= m) && 35 <= k) && 10 <= n)) || ((i <= 5 && 52 <= k) && (10 <= m && j <= 2) && 10 <= n)) || ((((10 <= m && i <= 1) && j <= 9) && 10 <= n) && 19 <= k)) || ((((j <= 5 && 10 <= m) && 15 <= k) && i <= 1) && 10 <= n)) || ((((53 <= k && 10 <= m) && j <= 3) && i <= 5) && 10 <= n)) || ((((10 <= m && 9 <= k) && j <= 9) && i <= 0) && 10 <= n)) || ((((21 <= k && 10 <= m) && j <= 1) && i <= 2) && 10 <= n)) || (((60 <= k && i <= 6) && 10 <= n) && 10 <= m && j <= 0)) || ((((i <= 3 && 10 <= m) && 39 <= k) && j <= 9) && 10 <= n)) || (((i + 1 <= n && 10 <= m && j <= 0) && 10 <= n) && 90 <= k)) || ((83 <= k && (10 <= m && j <= 3) && 10 <= n) && i <= 8)) || ((((10 <= m && i <= 8) && j <= 7) && 87 <= k) && 10 <= n)) || ((((10 <= m && j <= 3) && i <= 1) && 13 <= k) && 10 <= n)) || (((10 <= m && 20 <= k) && i <= 1) && 10 <= n)) || ((((10 <= m && i <= 4) && 47 <= k) && j <= 7) && 10 <= n)) || (((69 <= k && 10 <= m && j <= 9) && i <= 6) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 55 <= k) && i <= 5) && 10 <= n)) || ((((10 <= m && j <= 4) && 84 <= k) && i <= 8) && 10 <= n)) || (((56 <= k && i <= 5) && 10 <= m && j <= 6) && 10 <= n)) || ((((10 <= m && i <= 4) && j <= 2) && 42 <= k) && 10 <= n)) || ((((67 <= k && 10 <= m) && j <= 7) && i <= 6) && 10 <= n)) || ((71 <= k && (10 <= m && j <= 1) && 10 <= n) && i <= 7)) || (((10 <= m && i <= 8) && 10 <= n) && 90 <= k)) || (((i <= 3 && 10 <= m) && 40 <= k) && 10 <= n)) || ((((j <= 8 && 10 <= m) && 18 <= k) && i <= 1) && 10 <= n)) || (((10 <= m && 10 <= k) && i <= 0) && 10 <= n)) || ((((10 <= m && j <= 7) && i <= 7) && 77 <= k) && 10 <= n)) || (((50 <= k && 10 <= m) && i <= 4) && 10 <= n)) || (((78 <= k && i <= 7) && 10 <= n) && j <= 8 && 10 <= m)) || (99 <= k && (i + 1 <= n && 10 <= m && j <= 9) && 10 <= n)) || ((((10 <= m && j <= 1) && i <= 0) && 10 <= n) && 1 <= k)) || ((((i <= 3 && 10 <= m) && j <= 1) && 10 <= n) && 31 <= k)) || ((((10 <= m && 22 <= k) && i <= 2) && j <= 2) && 10 <= n)) || ((((10 <= m && j <= 3) && 10 <= n) && 63 <= k) && i <= 6)) || (((68 <= k && i <= 6) && 10 <= n) && j <= 8 && 10 <= m)) || ((((11 <= k && 10 <= m) && j <= 1) && i <= 1) && 10 <= n)) || ((((30 <= k && i <= 3) && 10 <= m) && j <= 0) && 10 <= n)) || ((((j <= 5 && 10 <= m) && 5 <= k) && i <= 0) && 10 <= n)) || ((((i <= 3 && j <= 8) && 10 <= m) && 38 <= k) && 10 <= n)) || ((((10 <= m && j <= 2) && 10 <= n) && i + 1 <= n) && 92 <= k)) || ((((14 <= k && 10 <= m) && i <= 1) && j <= 4) && 10 <= n)) || ((((10 <= m && i <= 2) && j <= 7) && 10 <= n) && 27 <= k)) || (((i + 1 <= n && 10 <= n) && j <= 8 && 10 <= m) && 98 <= k)) || ((((j <= 5 && 10 <= m) && 65 <= k) && i <= 6) && 10 <= n)) || (((i + 1 <= n && 10 <= m) && 10 <= n) && 100 <= k)) || ((((10 <= m && 40 <= k) && i <= 4) && j <= 0) && 10 <= n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. SAFE Result, 191.9s OverallTime, 19 OverallIterations, 110 TraceHistogramMax, 8.4s AutomataDifference, 0.0s DeadEndRemovalTime, 152.9s HoareAnnotationTime, HoareTripleCheckerStatistics: 867 SDtfs, 1725 SDslu, 3360 SDs, 0 SdLazy, 1186 SolverSat, 324 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8846 GetRequests, 8284 SyntacticMatches, 116 SemanticMatches, 446 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5503 ImplicationChecksByTransitivity, 19.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=364occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 285 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 26 PreInvPairs, 5143 NumberOfFragments, 1970 HoareAnnotationTreeSize, 26 FomulaSimplifications, 6246897 FormulaSimplificationTreeSizeReduction, 81.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 72380 FormulaSimplificationTreeSizeReductionInter, 71.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 21.4s InterpolantComputationTime, 6811 NumberOfCodeBlocks, 6515 NumberOfCodeBlocksAsserted, 421 NumberOfCheckSat, 11002 ConstructedInterpolants, 0 QuantifiedInterpolants, 11555734 SizeOfPredicates, 86 NumberOfNonLiveVariables, 8030 ConjunctsInSsa, 248 ConjunctsInUnsatCore, 79 InterpolantComputations, 4 PerfectInterpolantSequences, 75784/281762 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...