java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-69f5bdd-m [2018-09-18 09:56:12,264 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-18 09:56:12,266 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-18 09:56:12,286 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-18 09:56:12,287 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-18 09:56:12,288 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-18 09:56:12,290 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-18 09:56:12,293 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-18 09:56:12,296 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-18 09:56:12,297 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-18 09:56:12,307 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-18 09:56:12,307 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-18 09:56:12,311 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-18 09:56:12,312 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-18 09:56:12,313 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-18 09:56:12,314 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-18 09:56:12,317 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-18 09:56:12,321 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-18 09:56:12,324 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-18 09:56:12,328 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-18 09:56:12,332 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-18 09:56:12,333 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-18 09:56:12,339 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-18 09:56:12,339 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-18 09:56:12,339 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-18 09:56:12,340 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-18 09:56:12,342 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-18 09:56:12,343 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-18 09:56:12,344 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-18 09:56:12,346 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-18 09:56:12,346 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-18 09:56:12,349 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-09-18 09:56:12,353 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/taipanbench/svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf [2018-09-18 09:56:12,380 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-18 09:56:12,380 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-18 09:56:12,384 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-18 09:56:12,385 INFO L133 SettingsManager]: * User list type=DISABLED [2018-09-18 09:56:12,385 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-09-18 09:56:12,385 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-09-18 09:56:12,385 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-09-18 09:56:12,386 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-09-18 09:56:12,386 INFO L133 SettingsManager]: * Log string format=TERM [2018-09-18 09:56:12,386 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-09-18 09:56:12,386 INFO L133 SettingsManager]: * Parallel states before merging=1 [2018-09-18 09:56:12,387 INFO L133 SettingsManager]: * Interval Domain=false [2018-09-18 09:56:12,388 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-18 09:56:12,388 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-18 09:56:12,388 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-18 09:56:12,389 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-18 09:56:12,389 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-18 09:56:12,389 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-18 09:56:12,389 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-18 09:56:12,391 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-18 09:56:12,391 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-18 09:56:12,391 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-18 09:56:12,392 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-18 09:56:12,392 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-18 09:56:12,392 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 09:56:12,392 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-18 09:56:12,393 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-18 09:56:12,393 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-18 09:56:12,393 INFO L133 SettingsManager]: * Trace refinement strategy=RUBBER_TAIPAN [2018-09-18 09:56:12,393 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-18 09:56:12,393 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-18 09:56:12,394 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-18 09:56:12,394 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-09-18 09:56:12,394 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-09-18 09:56:12,462 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-18 09:56:12,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-18 09:56:12,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-18 09:56:12,489 INFO L271 PluginConnector]: Initializing CDTParser... [2018-09-18 09:56:12,489 INFO L276 PluginConnector]: CDTParser initialized [2018-09-18 09:56:12,490 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-09-18 09:56:12,853 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc7aab79/1a4c2fe861834d2987fb63c9012d53f8/FLAG69c35ede1 [2018-09-18 09:56:12,991 INFO L277 CDTParser]: Found 1 translation units. [2018-09-18 09:56:12,991 INFO L159 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-09-18 09:56:12,997 INFO L325 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc7aab79/1a4c2fe861834d2987fb63c9012d53f8/FLAG69c35ede1 [2018-09-18 09:56:13,012 INFO L333 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc7aab79/1a4c2fe861834d2987fb63c9012d53f8 [2018-09-18 09:56:13,027 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-18 09:56:13,035 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-09-18 09:56:13,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-09-18 09:56:13,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-09-18 09:56:13,046 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-09-18 09:56:13,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f7072c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13, skipping insertion in model container [2018-09-18 09:56:13,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,065 INFO L160 ieTranslatorObserver]: Starting translation in SV-COMP mode [2018-09-18 09:56:13,288 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 09:56:13,314 INFO L424 MainDispatcher]: Starting main dispatcher in SV-COMP mode [2018-09-18 09:56:13,323 INFO L170 PostProcessor]: Settings: Checked method=main [2018-09-18 09:56:13,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13 WrapperNode [2018-09-18 09:56:13,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-09-18 09:56:13,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-18 09:56:13,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-18 09:56:13,350 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-18 09:56:13,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,376 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-18 09:56:13,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-18 09:56:13,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-18 09:56:13,414 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-18 09:56:13,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... [2018-09-18 09:56:13,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-18 09:56:13,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-18 09:56:13,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-18 09:56:13,453 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-18 09:56:13,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-18 09:56:13,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-09-18 09:56:13,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-09-18 09:56:13,691 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2018-09-18 09:56:13,691 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2018-09-18 09:56:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-18 09:56:13,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-18 09:56:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-18 09:56:13,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-18 09:56:13,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-09-18 09:56:13,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-09-18 09:56:14,119 INFO L356 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-18 09:56:14,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 09:56:14 BoogieIcfgContainer [2018-09-18 09:56:14,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-18 09:56:14,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-18 09:56:14,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-18 09:56:14,124 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-18 09:56:14,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 09:56:13" (1/3) ... [2018-09-18 09:56:14,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4262631f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 09:56:14, skipping insertion in model container [2018-09-18 09:56:14,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 09:56:13" (2/3) ... [2018-09-18 09:56:14,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4262631f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 09:56:14, skipping insertion in model container [2018-09-18 09:56:14,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 09:56:14" (3/3) ... [2018-09-18 09:56:14,128 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch_true-unreach-call.i [2018-09-18 09:56:14,138 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-18 09:56:14,146 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-18 09:56:14,193 INFO L130 ementStrategyFactory]: Using default assertion order modulation [2018-09-18 09:56:14,193 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-18 09:56:14,194 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-18 09:56:14,194 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-18 09:56:14,194 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-18 09:56:14,194 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-18 09:56:14,194 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-18 09:56:14,195 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-18 09:56:14,195 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-18 09:56:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-09-18 09:56:14,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-18 09:56:14,236 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:56:14,239 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:56:14,241 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:56:14,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1679407704, now seen corresponding path program 1 times [2018-09-18 09:56:14,250 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:56:14,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:14,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:14,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:14,302 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:56:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:14,436 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 09:56:14,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-18 09:56:14,436 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 09:56:14,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-09-18 09:56:14,454 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-09-18 09:56:14,455 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-18 09:56:14,457 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2018-09-18 09:56:14,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:56:14,480 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-09-18 09:56:14,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-09-18 09:56:14,482 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-09-18 09:56:14,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:56:14,490 INFO L225 Difference]: With dead ends: 44 [2018-09-18 09:56:14,490 INFO L226 Difference]: Without dead ends: 21 [2018-09-18 09:56:14,494 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-09-18 09:56:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-18 09:56:14,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-18 09:56:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-18 09:56:14,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-18 09:56:14,537 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-09-18 09:56:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:56:14,537 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-18 09:56:14,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-09-18 09:56:14,538 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-18 09:56:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-18 09:56:14,539 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:56:14,539 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:56:14,539 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:56:14,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1597240285, now seen corresponding path program 1 times [2018-09-18 09:56:14,540 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:56:14,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:14,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:14,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:14,542 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:56:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:14,785 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 09:56:14,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-09-18 09:56:14,786 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 09:56:14,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-18 09:56:14,788 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-18 09:56:14,789 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-18 09:56:14,789 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-09-18 09:56:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:56:14,887 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-18 09:56:14,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-18 09:56:14,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-09-18 09:56:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:56:14,889 INFO L225 Difference]: With dead ends: 29 [2018-09-18 09:56:14,889 INFO L226 Difference]: Without dead ends: 21 [2018-09-18 09:56:14,890 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-18 09:56:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-18 09:56:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-18 09:56:14,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-18 09:56:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-18 09:56:14,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-09-18 09:56:14,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:56:14,896 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-18 09:56:14,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-18 09:56:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-18 09:56:14,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-18 09:56:14,897 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:56:14,897 INFO L376 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:56:14,897 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:56:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash 145570050, now seen corresponding path program 1 times [2018-09-18 09:56:14,897 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:56:14,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:14,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:14,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:14,899 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:56:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:15,136 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 09:56:15,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-18 09:56:15,137 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 09:56:15,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-18 09:56:15,138 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-18 09:56:15,138 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-18 09:56:15,138 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-09-18 09:56:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:56:15,513 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-09-18 09:56:15,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-18 09:56:15,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-18 09:56:15,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:56:15,515 INFO L225 Difference]: With dead ends: 34 [2018-09-18 09:56:15,515 INFO L226 Difference]: Without dead ends: 25 [2018-09-18 09:56:15,516 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-18 09:56:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-18 09:56:15,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-18 09:56:15,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-18 09:56:15,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-18 09:56:15,523 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-09-18 09:56:15,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:56:15,524 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-18 09:56:15,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-18 09:56:15,524 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-18 09:56:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-18 09:56:15,525 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:56:15,525 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:56:15,526 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:56:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1819847252, now seen corresponding path program 1 times [2018-09-18 09:56:15,526 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:56:15,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:15,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:15,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:15,527 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:56:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:16,051 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-09-18 09:56:16,288 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-09-18 09:56:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:16,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:56:16,338 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 09:56:16,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:16,360 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 09:56:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:16,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:56:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:16,764 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:56:16,981 WARN L178 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-09-18 09:56:17,330 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-09-18 09:56:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:17,928 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:56:17,928 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:56:17,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:17,956 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 09:56:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:18,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:56:26,386 WARN L178 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 35 DAG size of output: 13 [2018-09-18 09:56:28,417 WARN L178 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 09:56:32,794 WARN L178 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 25 [2018-09-18 09:56:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:33,020 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:56:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:33,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 09:56:33,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 8, 7] total 25 [2018-09-18 09:56:33,454 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 09:56:33,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-18 09:56:33,455 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-18 09:56:33,457 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=461, Unknown=2, NotChecked=0, Total=600 [2018-09-18 09:56:33,457 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-18 09:56:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:56:38,457 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-18 09:56:38,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-18 09:56:38,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-09-18 09:56:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:56:38,462 INFO L225 Difference]: With dead ends: 43 [2018-09-18 09:56:38,463 INFO L226 Difference]: Without dead ends: 34 [2018-09-18 09:56:38,464 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=204, Invalid=661, Unknown=5, NotChecked=0, Total=870 [2018-09-18 09:56:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-18 09:56:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2018-09-18 09:56:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-18 09:56:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-09-18 09:56:38,470 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-09-18 09:56:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:56:38,471 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-09-18 09:56:38,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-18 09:56:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-09-18 09:56:38,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-18 09:56:38,472 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:56:38,472 INFO L376 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:56:38,473 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:56:38,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2082093034, now seen corresponding path program 1 times [2018-09-18 09:56:38,473 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:56:38,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:38,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:38,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:38,475 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:56:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:39,312 WARN L178 SmtUtils]: Spent 701.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 27 [2018-09-18 09:56:39,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:39,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:56:39,746 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 09:56:39,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:39,754 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 09:56:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:39,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:56:39,807 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:56:39,807 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:39,837 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-09-18 09:56:39,840 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:56:39,840 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:39,842 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:56:39,845 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:56:39,846 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:17 [2018-09-18 09:56:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:41,485 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:56:41,605 WARN L178 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-09-18 09:56:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:42,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:56:42,539 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:56:42,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:42,555 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-09-18 09:56:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:42,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:56:42,679 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:56:42,679 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:42,715 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-18 09:56:42,733 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:56:42,734 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:42,812 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:56:42,818 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-09-18 09:56:42,822 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:56:42,823 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:42,845 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:56:42,852 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-18 09:56:42,857 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:56:42,857 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:44,880 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:56:44,889 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-09-18 09:56:44,908 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:56:44,909 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:44,942 INFO L267 ElimStorePlain]: Start of recursive call 9: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:56:44,946 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:56:44,946 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-09-18 09:56:47,149 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-09-18 09:56:47,149 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-09-18 09:56:47,878 WARN L178 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2018-09-18 09:56:48,691 WARN L178 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-09-18 09:56:49,386 WARN L178 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-18 09:56:55,375 WARN L178 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2018-09-18 09:56:56,162 WARN L178 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2018-09-18 09:56:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:56,195 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:56:56,346 WARN L178 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 47 [2018-09-18 09:56:57,237 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2018-09-18 09:56:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:57,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 09:56:57,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10, 10, 9] total 39 [2018-09-18 09:56:57,854 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 09:56:57,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-18 09:56:57,855 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-18 09:56:57,855 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1281, Unknown=1, NotChecked=0, Total=1482 [2018-09-18 09:56:57,856 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 16 states. [2018-09-18 09:56:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:56:58,842 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2018-09-18 09:56:58,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-18 09:56:58,842 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-09-18 09:56:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:56:58,844 INFO L225 Difference]: With dead ends: 48 [2018-09-18 09:56:58,845 INFO L226 Difference]: Without dead ends: 36 [2018-09-18 09:56:58,846 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=262, Invalid=1717, Unknown=1, NotChecked=0, Total=1980 [2018-09-18 09:56:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-18 09:56:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2018-09-18 09:56:58,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-18 09:56:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-09-18 09:56:58,853 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-09-18 09:56:58,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:56:58,853 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-09-18 09:56:58,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-18 09:56:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-09-18 09:56:58,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-18 09:56:58,854 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:56:58,854 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:56:58,855 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:56:58,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1253110442, now seen corresponding path program 2 times [2018-09-18 09:56:58,855 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:56:58,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:58,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-18 09:56:58,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:56:58,856 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:56:58,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:56:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:56:59,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:56:59,217 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-18 09:56:59,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 09:56:59,229 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 09:56:59,262 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-09-18 09:56:59,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 09:56:59,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:56:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 09:56:59,374 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:56:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 09:56:59,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:56:59,745 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:56:59,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 09:56:59,761 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 09:56:59,822 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-09-18 09:56:59,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 09:56:59,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:57:14,248 WARN L178 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-09-18 09:57:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 09:57:14,326 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:57:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-09-18 09:57:15,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 09:57:15,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6, 7, 6] total 25 [2018-09-18 09:57:15,166 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 09:57:15,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-18 09:57:15,167 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-18 09:57:15,168 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=479, Unknown=7, NotChecked=0, Total=600 [2018-09-18 09:57:15,168 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2018-09-18 09:57:31,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:57:31,571 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2018-09-18 09:57:31,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-18 09:57:31,571 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2018-09-18 09:57:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:57:31,572 INFO L225 Difference]: With dead ends: 52 [2018-09-18 09:57:31,572 INFO L226 Difference]: Without dead ends: 40 [2018-09-18 09:57:31,573 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 13 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=247, Invalid=928, Unknown=15, NotChecked=0, Total=1190 [2018-09-18 09:57:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-18 09:57:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2018-09-18 09:57:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-18 09:57:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-09-18 09:57:31,579 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 28 [2018-09-18 09:57:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:57:31,579 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-09-18 09:57:31,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-18 09:57:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-09-18 09:57:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-18 09:57:31,580 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:57:31,580 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:57:31,581 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:57:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1646137452, now seen corresponding path program 2 times [2018-09-18 09:57:31,581 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:57:31,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:57:31,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 09:57:31,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:57:31,582 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:57:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:57:31,979 WARN L178 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 24 [2018-09-18 09:57:32,408 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2018-09-18 09:57:32,537 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2018-09-18 09:57:35,078 WARN L178 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2018-09-18 09:57:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:57:35,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:57:35,084 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:57:35,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 09:57:35,093 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 09:57:35,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 09:57:35,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 09:57:35,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:57:35,160 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:57:35,160 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-18 09:57:39,210 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-09-18 09:57:39,213 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:57:39,214 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-18 09:57:39,216 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:57:39,218 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:57:39,218 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:91, output treesize:17 [2018-09-18 09:57:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:57:39,972 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:57:40,152 WARN L178 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2018-09-18 09:57:41,016 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2018-09-18 09:57:42,078 WARN L178 SmtUtils]: Spent 586.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-09-18 09:57:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:57:42,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:57:42,538 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:57:42,555 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-18 09:57:42,555 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 09:57:42,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-18 09:57:42,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 09:57:42,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:57:42,699 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:57:42,700 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-18 09:57:42,701 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:57:42,702 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-18 09:57:42,703 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:57:42,704 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-18 09:57:42,779 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 36 [2018-09-18 09:57:42,783 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:57:42,783 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-09-18 09:57:42,798 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:57:42,803 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 31 [2018-09-18 09:57:42,806 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:57:42,806 INFO L267 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2018-09-18 09:57:42,817 INFO L267 ElimStorePlain]: Start of recursive call 7: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:57:44,854 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-09-18 09:57:44,855 INFO L202 ElimStorePlain]: Needed 8 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-09-18 09:57:53,812 WARN L178 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2018-09-18 09:57:56,696 WARN L178 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 39 [2018-09-18 09:57:58,761 WARN L178 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 52 [2018-09-18 09:58:00,437 WARN L178 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-09-18 09:58:02,542 WARN L178 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-09-18 09:58:02,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:58:02,863 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:58:03,120 WARN L178 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2018-09-18 09:58:03,283 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2018-09-18 09:58:04,151 WARN L178 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2018-09-18 09:58:04,907 WARN L178 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2018-09-18 09:58:05,301 WARN L178 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2018-09-18 09:58:05,610 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-09-18 09:58:05,935 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-09-18 09:58:06,264 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-09-18 09:58:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:58:06,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 09:58:06,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 14, 13] total 55 [2018-09-18 09:58:06,318 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 09:58:06,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-18 09:58:06,319 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-18 09:58:06,320 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2639, Unknown=0, NotChecked=0, Total=2970 [2018-09-18 09:58:06,320 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 22 states. [2018-09-18 09:58:06,785 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-09-18 09:58:09,412 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2018-09-18 09:58:10,848 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2018-09-18 09:58:12,357 WARN L178 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 131 DAG size of output: 61 [2018-09-18 09:58:12,864 WARN L178 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2018-09-18 09:58:13,555 WARN L178 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2018-09-18 09:58:13,852 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2018-09-18 09:58:14,418 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 78 [2018-09-18 09:58:14,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:58:14,466 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-09-18 09:58:14,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 09:58:14,467 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2018-09-18 09:58:14,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:58:14,468 INFO L225 Difference]: With dead ends: 59 [2018-09-18 09:58:14,468 INFO L226 Difference]: Without dead ends: 47 [2018-09-18 09:58:14,470 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=486, Invalid=4205, Unknown=1, NotChecked=0, Total=4692 [2018-09-18 09:58:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-18 09:58:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2018-09-18 09:58:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-18 09:58:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-09-18 09:58:14,477 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2018-09-18 09:58:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:58:14,477 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-09-18 09:58:14,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-18 09:58:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-09-18 09:58:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-18 09:58:14,478 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:58:14,478 INFO L376 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:58:14,479 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:58:14,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1637712594, now seen corresponding path program 3 times [2018-09-18 09:58:14,479 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:58:14,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:58:14,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 09:58:14,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:58:14,480 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:58:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:58:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-18 09:58:14,545 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-18 09:58:14,545 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-18 09:58:14,545 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-09-18 09:58:14,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-18 09:58:14,546 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-18 09:58:14,546 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 09:58:14,546 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2018-09-18 09:58:14,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:58:14,612 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2018-09-18 09:58:14,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-18 09:58:14,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-09-18 09:58:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:58:14,613 INFO L225 Difference]: With dead ends: 56 [2018-09-18 09:58:14,614 INFO L226 Difference]: Without dead ends: 33 [2018-09-18 09:58:14,614 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-18 09:58:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-18 09:58:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-18 09:58:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-18 09:58:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-18 09:58:14,621 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 28 [2018-09-18 09:58:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:58:14,621 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-18 09:58:14,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-18 09:58:14,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-18 09:58:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-18 09:58:14,624 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:58:14,624 INFO L376 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:58:14,624 INFO L423 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:58:14,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1605254594, now seen corresponding path program 4 times [2018-09-18 09:58:14,624 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:58:14,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:58:14,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 09:58:14,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:58:14,626 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:58:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:58:15,109 WARN L178 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 35 [2018-09-18 09:58:20,163 WARN L178 SmtUtils]: Spent 3.87 s on a formula simplification that was a NOOP. DAG size: 50 [2018-09-18 09:58:22,499 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 35 [2018-09-18 09:58:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:58:22,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:58:22,506 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:58:22,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-18 09:58:22,516 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-18 09:58:22,589 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-18 09:58:22,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 09:58:22,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:58:22,603 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-09-18 09:58:22,623 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:58:22,624 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-18 09:58:22,636 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:58:22,639 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-09-18 09:58:22,642 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:58:22,643 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-09-18 09:58:22,651 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:58:24,681 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:58:24,682 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-09-18 09:58:25,212 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-09-18 09:58:25,647 WARN L178 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2018-09-18 09:58:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:58:26,671 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:58:26,994 WARN L178 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 89 [2018-09-18 09:58:29,670 WARN L178 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-18 09:58:29,947 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-18 09:58:30,253 WARN L178 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-09-18 09:58:30,828 WARN L178 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-09-18 09:58:31,496 WARN L178 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2018-09-18 09:58:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:58:31,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:58:31,542 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:58:31,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-18 09:58:31,559 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-09-18 09:58:31,688 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-18 09:58:31,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 09:58:31,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:58:31,696 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 09:58:31,697 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-18 09:58:39,752 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-09-18 09:58:39,765 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:58:39,765 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-18 09:58:39,767 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:58:39,773 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:58:39,774 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-09-18 09:58:40,663 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2018-09-18 09:58:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:58:41,373 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:58:41,556 WARN L178 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2018-09-18 09:58:42,505 WARN L178 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-09-18 09:58:44,034 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2018-09-18 09:58:44,490 WARN L178 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2018-09-18 09:58:44,951 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2018-09-18 09:58:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:58:44,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-09-18 09:58:44,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16, 15, 14] total 64 [2018-09-18 09:58:44,975 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-09-18 09:58:44,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-18 09:58:44,976 INFO L147 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-18 09:58:44,977 INFO L148 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3727, Unknown=1, NotChecked=0, Total=4032 [2018-09-18 09:58:44,977 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 27 states. [2018-09-18 09:58:46,109 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2018-09-18 09:58:46,627 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2018-09-18 09:58:46,979 WARN L178 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-09-18 09:58:48,007 WARN L178 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 76 [2018-09-18 09:58:52,574 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 69 [2018-09-18 09:58:53,268 WARN L178 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2018-09-18 09:58:55,028 WARN L178 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2018-09-18 09:58:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-18 09:58:55,556 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-18 09:58:55,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-18 09:58:55,557 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 32 [2018-09-18 09:58:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-18 09:58:55,558 INFO L225 Difference]: With dead ends: 48 [2018-09-18 09:58:55,558 INFO L226 Difference]: Without dead ends: 38 [2018-09-18 09:58:55,560 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=559, Invalid=5445, Unknown=2, NotChecked=0, Total=6006 [2018-09-18 09:58:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-18 09:58:55,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-09-18 09:58:55,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-18 09:58:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-18 09:58:55,567 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 32 [2018-09-18 09:58:55,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-18 09:58:55,567 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-18 09:58:55,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-18 09:58:55,567 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-18 09:58:55,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-18 09:58:55,568 INFO L368 BasicCegarLoop]: Found error trace [2018-09-18 09:58:55,568 INFO L376 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-18 09:58:55,569 INFO L423 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-09-18 09:58:55,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1810116584, now seen corresponding path program 5 times [2018-09-18 09:58:55,569 INFO L69 tionRefinementEngine]: Using refinement strategy RubberTaipanRefinementStrategy [2018-09-18 09:58:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:58:55,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-18 09:58:55,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-18 09:58:55,570 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-09-18 09:58:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-18 09:58:56,761 WARN L178 SmtUtils]: Spent 994.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 34 [2018-09-18 09:58:57,386 WARN L178 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2018-09-18 09:58:59,593 WARN L178 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2018-09-18 09:58:59,878 WARN L178 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2018-09-18 09:59:20,119 WARN L178 SmtUtils]: Spent 18.13 s on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2018-09-18 09:59:33,680 WARN L178 SmtUtils]: Spent 9.16 s on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2018-09-18 09:59:36,127 WARN L178 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2018-09-18 09:59:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:59:36,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 09:59:36,140 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 09:59:36,149 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-18 09:59:36,149 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 09:59:36,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-18 09:59:36,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 09:59:36,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 09:59:36,537 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-09-18 09:59:36,543 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:59:36,543 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-09-18 09:59:36,552 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:59:36,555 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-09-18 09:59:36,557 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 09:59:36,557 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-09-18 09:59:36,574 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:59:38,605 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-09-18 09:59:38,606 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-09-18 09:59:49,010 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2018-09-18 09:59:55,687 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2018-09-18 09:59:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 09:59:56,173 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 09:59:56,506 WARN L178 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2018-09-18 09:59:56,674 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2018-09-18 09:59:57,658 WARN L178 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2018-09-18 09:59:57,962 WARN L178 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2018-09-18 09:59:58,231 WARN L178 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2018-09-18 09:59:58,492 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-09-18 09:59:58,829 WARN L178 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-18 09:59:59,447 WARN L178 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2018-09-18 09:59:59,957 WARN L178 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-09-18 10:00:01,001 WARN L178 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-09-18 10:00:01,770 WARN L178 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2018-09-18 10:00:03,428 WARN L178 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2018-09-18 10:00:06,260 WARN L178 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2018-09-18 10:00:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:00:06,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-18 10:00:06,404 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-18 10:00:06,431 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-18 10:00:06,431 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder INSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-09-18 10:00:06,633 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-18 10:00:06,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-18 10:00:06,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-18 10:00:06,646 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 10:00:06,646 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-09-18 10:00:06,653 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 43 [2018-09-18 10:00:06,657 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 10:00:06,658 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-09-18 10:00:06,675 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 10:00:06,681 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-18 10:00:06,688 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 10:00:06,688 INFO L267 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2018-09-18 10:00:06,704 INFO L267 ElimStorePlain]: Start of recursive call 5: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 10:00:06,706 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-09-18 10:00:06,706 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-09-18 10:00:06,712 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 42 [2018-09-18 10:00:06,719 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 10:00:06,720 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-09-18 10:00:08,741 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 10:00:08,747 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2018-09-18 10:00:08,751 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-09-18 10:00:08,751 INFO L267 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2018-09-18 10:00:08,770 INFO L267 ElimStorePlain]: Start of recursive call 10: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-09-18 10:00:10,865 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2018-09-18 10:00:10,865 INFO L202 ElimStorePlain]: Needed 11 recursive calls to eliminate 5 variables, input treesize:445, output treesize:66 [2018-09-18 10:00:20,042 WARN L178 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-09-18 10:00:21,215 WARN L178 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-09-18 10:00:26,249 WARN L178 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 40 [2018-09-18 10:00:28,609 WARN L178 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 45 [2018-09-18 10:00:34,698 WARN L178 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2018-09-18 10:00:35,665 WARN L178 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-09-18 10:00:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-18 10:00:37,019 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-09-18 10:00:37,215 WARN L178 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2018-09-18 10:00:40,683 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2018-09-18 10:00:41,401 WARN L178 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2018-09-18 10:00:42,622 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2018-09-18 10:00:46,486 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2018-09-18 10:00:47,478 WARN L178 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 Received shutdown request... [2018-09-18 10:00:48,864 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-18 10:00:49,064 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-09-18 10:00:49,065 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-18 10:00:49,070 WARN L206 ceAbstractionStarter]: Timeout [2018-09-18 10:00:49,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 10:00:49 BoogieIcfgContainer [2018-09-18 10:00:49,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-18 10:00:49,071 INFO L168 Benchmark]: Toolchain (without parser) took 276043.51 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -790.7 MB). Peak memory consumption was 277.8 MB. Max. memory is 7.1 GB. [2018-09-18 10:00:49,072 INFO L168 Benchmark]: CDTParser took 0.22 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. [2018-09-18 10:00:49,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.74 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. [2018-09-18 10:00:49,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.35 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. [2018-09-18 10:00:49,073 INFO L168 Benchmark]: Boogie Preprocessor took 38.63 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. [2018-09-18 10:00:49,074 INFO L168 Benchmark]: RCFGBuilder took 667.11 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -830.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-09-18 10:00:49,074 INFO L168 Benchmark]: TraceAbstraction took 274949.76 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 281.0 MB). Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.2 MB). Peak memory consumption was 310.2 MB. Max. memory is 7.1 GB. [2018-09-18 10:00:49,076 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.74 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 64.35 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 38.63 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 667.11 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 787.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -830.4 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 274949.76 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 281.0 MB). Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: 29.2 MB). Peak memory consumption was 310.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 37 with TraceHistMax 5, while TraceCheckSpWp was constructing backward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 71 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. TIMEOUT Result, 274.8s OverallTime, 10 OverallIterations, 5 TraceHistogramMax, 41.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 180 SDtfs, 233 SDslu, 928 SDs, 0 SdLazy, 1008 SolverSat, 79 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 661 GetRequests, 371 SyntacticMatches, 33 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3954 ImplicationChecksByTransitivity, 131.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 38 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 117.9s InterpolantComputationTime, 493 NumberOfCodeBlocks, 477 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 736 ConstructedInterpolants, 174 QuantifiedInterpolants, 718720 SizeOfPredicates, 152 NumberOfNonLiveVariables, 1332 ConjunctsInSsa, 363 ConjunctsInUnsatCore, 29 InterpolantComputations, 4 PerfectInterpolantSequences, 45/292 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/linear_sea.ch_true-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-Benchmark-0-2018-09-18_10-00-49-086.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/linear_sea.ch_true-unreach-call.i_svcomp-Reach-64bit-RubberTaipan_Default-OldIcfg.epf_AutomizerCInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-18_10-00-49-086.csv Completed graceful shutdown