java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:49:30,463 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:49:30,467 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:49:30,481 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:49:30,481 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:49:30,482 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:49:30,483 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:49:30,485 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:49:30,486 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:49:30,488 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:49:30,489 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:49:30,490 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:49:30,491 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:49:30,491 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:49:30,494 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:49:30,494 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:49:30,495 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:49:30,497 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:49:30,499 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:49:30,501 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:49:30,502 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:49:30,503 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:49:30,505 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 11:49:30,505 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 11:49:30,505 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 11:49:30,506 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 11:49:30,507 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 11:49:30,508 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 11:49:30,509 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 11:49:30,510 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 11:49:30,510 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 11:49:30,511 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-24 11:49:30,513 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-24 11:49:30,543 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:49:30,543 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:49:30,544 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:49:30,544 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:49:30,548 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:49:30,548 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:49:30,549 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:49:30,549 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:49:30,549 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:49:30,549 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:49:30,549 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:49:30,550 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:49:30,550 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:49:30,550 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:49:30,550 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:49:30,550 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:49:30,551 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:49:30,551 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:49:30,551 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:49:30,551 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:49:30,551 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:49:30,551 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:49:30,552 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:49:30,552 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:49:30,552 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:49:30,552 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:49:30,552 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:49:30,553 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:49:30,620 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:49:30,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:49:30,640 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:49:30,641 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:49:30,642 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:49:30,643 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-10-24 11:49:30,710 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/caa4665fc/713f568e190b4dc89bb717fd6a778a76/FLAG07fe3a0ef [2018-10-24 11:49:31,197 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:49:31,198 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-10-24 11:49:31,203 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/caa4665fc/713f568e190b4dc89bb717fd6a778a76/FLAG07fe3a0ef [2018-10-24 11:49:31,217 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/caa4665fc/713f568e190b4dc89bb717fd6a778a76 [2018-10-24 11:49:31,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:49:31,228 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:49:31,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:49:31,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:49:31,233 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:49:31,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,237 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e66d9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31, skipping insertion in model container [2018-10-24 11:49:31,238 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:49:31,265 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:49:31,439 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:49:31,443 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:49:31,465 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:49:31,487 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:49:31,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31 WrapperNode [2018-10-24 11:49:31,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:49:31,489 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:49:31,489 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:49:31,489 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:49:31,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,532 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:49:31,532 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:49:31,532 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:49:31,533 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:49:31,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,545 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... [2018-10-24 11:49:31,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:49:31,559 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:49:31,559 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:49:31,559 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:49:31,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:49:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-24 11:49:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:49:31,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:49:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-24 11:49:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-24 11:49:32,132 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:49:32,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:49:32 BoogieIcfgContainer [2018-10-24 11:49:32,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:49:32,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:49:32,135 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:49:32,139 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:49:32,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:49:31" (1/3) ... [2018-10-24 11:49:32,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad9c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:49:32, skipping insertion in model container [2018-10-24 11:49:32,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:49:31" (2/3) ... [2018-10-24 11:49:32,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad9c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:49:32, skipping insertion in model container [2018-10-24 11:49:32,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:49:32" (3/3) ... [2018-10-24 11:49:32,145 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call2_true-termination.i [2018-10-24 11:49:32,156 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:49:32,164 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:49:32,177 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:49:32,208 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:49:32,209 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:49:32,209 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:49:32,209 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:49:32,209 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:49:32,210 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:49:32,210 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:49:32,210 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:49:32,210 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:49:32,226 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-24 11:49:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 11:49:32,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:32,233 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:32,236 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:32,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:32,243 INFO L82 PathProgramCache]: Analyzing trace with hash 2021094374, now seen corresponding path program 1 times [2018-10-24 11:49:32,245 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:32,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:32,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:32,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:32,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:32,366 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:49:32,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:49:32,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:49:32,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:49:32,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:49:32,389 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-24 11:49:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:32,407 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-24 11:49:32,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:49:32,409 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-24 11:49:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:32,420 INFO L225 Difference]: With dead ends: 38 [2018-10-24 11:49:32,420 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 11:49:32,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:49:32,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 11:49:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-24 11:49:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:49:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-24 11:49:32,460 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2018-10-24 11:49:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:32,461 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-24 11:49:32,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:49:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-24 11:49:32,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-24 11:49:32,462 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:32,462 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:32,462 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:32,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:32,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1064529813, now seen corresponding path program 1 times [2018-10-24 11:49:32,463 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:32,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:32,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:32,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:32,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:32,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:32,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:49:32,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:49:32,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:49:32,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:49:32,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:49:32,537 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-10-24 11:49:32,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:32,624 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-24 11:49:32,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:49:32,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-24 11:49:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:32,625 INFO L225 Difference]: With dead ends: 27 [2018-10-24 11:49:32,625 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 11:49:32,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:49:32,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 11:49:32,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-24 11:49:32,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:49:32,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-24 11:49:32,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2018-10-24 11:49:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:32,631 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-24 11:49:32,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:49:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-24 11:49:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 11:49:32,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:32,633 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:32,633 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:32,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:32,634 INFO L82 PathProgramCache]: Analyzing trace with hash 55281387, now seen corresponding path program 1 times [2018-10-24 11:49:32,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:32,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:32,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:32,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:32,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:32,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:32,741 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:32,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:32,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:32,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:32,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-24 11:49:32,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:49:32,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:49:32,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:49:32,870 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-24 11:49:33,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:33,040 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-24 11:49:33,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:49:33,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-24 11:49:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:33,042 INFO L225 Difference]: With dead ends: 32 [2018-10-24 11:49:33,042 INFO L226 Difference]: Without dead ends: 26 [2018-10-24 11:49:33,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:49:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-24 11:49:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-10-24 11:49:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-24 11:49:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-24 11:49:33,047 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2018-10-24 11:49:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:33,047 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-24 11:49:33,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:49:33,047 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-24 11:49:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-24 11:49:33,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:33,048 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:33,049 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:33,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1196780203, now seen corresponding path program 2 times [2018-10-24 11:49:33,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:33,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:33,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:33,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:33,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:33,186 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:33,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:33,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:33,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:33,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:33,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:33,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-24 11:49:33,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 11:49:33,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 11:49:33,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:49:33,391 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2018-10-24 11:49:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:33,511 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-24 11:49:33,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:49:33,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-10-24 11:49:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:33,513 INFO L225 Difference]: With dead ends: 37 [2018-10-24 11:49:33,513 INFO L226 Difference]: Without dead ends: 31 [2018-10-24 11:49:33,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:49:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-24 11:49:33,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-24 11:49:33,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-24 11:49:33,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-24 11:49:33,518 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2018-10-24 11:49:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:33,519 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-24 11:49:33,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 11:49:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-24 11:49:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-24 11:49:33,520 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:33,520 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:33,521 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:33,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash 526776619, now seen corresponding path program 3 times [2018-10-24 11:49:33,521 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:33,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:33,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:33,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:33,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:33,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:33,677 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:33,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:33,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:49:33,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:33,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:33,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:33,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-24 11:49:33,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:49:33,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:49:33,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:49:33,831 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 7 states. [2018-10-24 11:49:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:33,928 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-24 11:49:33,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:49:33,929 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-10-24 11:49:33,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:33,931 INFO L225 Difference]: With dead ends: 42 [2018-10-24 11:49:33,932 INFO L226 Difference]: Without dead ends: 36 [2018-10-24 11:49:33,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:49:33,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-24 11:49:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-10-24 11:49:33,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-24 11:49:33,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-24 11:49:33,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2018-10-24 11:49:33,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:33,938 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-24 11:49:33,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:49:33,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-24 11:49:33,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 11:49:33,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:33,939 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:33,940 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:33,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash 310217493, now seen corresponding path program 4 times [2018-10-24 11:49:33,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:33,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:33,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:33,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:33,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:34,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:34,055 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:34,070 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:49:34,107 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:49:34,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:34,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:34,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:34,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-24 11:49:34,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:49:34,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:49:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:49:34,164 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2018-10-24 11:49:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:34,379 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-24 11:49:34,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:49:34,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-10-24 11:49:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:34,382 INFO L225 Difference]: With dead ends: 47 [2018-10-24 11:49:34,382 INFO L226 Difference]: Without dead ends: 41 [2018-10-24 11:49:34,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:49:34,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-24 11:49:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-10-24 11:49:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-24 11:49:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-24 11:49:34,396 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-10-24 11:49:34,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:34,398 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-24 11:49:34,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:49:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-24 11:49:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-24 11:49:34,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:34,402 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:34,404 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:34,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:34,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1942395755, now seen corresponding path program 5 times [2018-10-24 11:49:34,405 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:34,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:34,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:34,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:34,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:34,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:34,759 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-24 11:49:34,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:34,842 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-24 11:49:34,843 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:34,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:34,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:34,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-24 11:49:34,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-24 11:49:34,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-24 11:49:34,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:49:34,892 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 9 states. [2018-10-24 11:49:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:34,995 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-24 11:49:34,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:49:34,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-24 11:49:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:34,997 INFO L225 Difference]: With dead ends: 52 [2018-10-24 11:49:34,997 INFO L226 Difference]: Without dead ends: 46 [2018-10-24 11:49:34,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-24 11:49:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-24 11:49:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-10-24 11:49:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-24 11:49:35,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-24 11:49:35,003 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2018-10-24 11:49:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:35,004 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-24 11:49:35,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-24 11:49:35,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-24 11:49:35,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-24 11:49:35,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:35,005 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:35,006 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:35,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:35,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1483231445, now seen corresponding path program 6 times [2018-10-24 11:49:35,006 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:35,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:35,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:35,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:35,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:35,314 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:35,323 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:49:35,450 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-24 11:49:35,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:35,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:35,612 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:35,612 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-24 11:49:35,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:49:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:49:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:49:35,614 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 10 states. [2018-10-24 11:49:35,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:35,927 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-24 11:49:35,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:49:35,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-10-24 11:49:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:35,928 INFO L225 Difference]: With dead ends: 57 [2018-10-24 11:49:35,929 INFO L226 Difference]: Without dead ends: 51 [2018-10-24 11:49:35,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:49:35,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-24 11:49:35,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-10-24 11:49:35,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-24 11:49:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-24 11:49:35,934 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2018-10-24 11:49:35,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:35,935 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-24 11:49:35,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:49:35,935 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-24 11:49:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-24 11:49:35,936 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:35,937 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:35,937 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:35,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1032753749, now seen corresponding path program 7 times [2018-10-24 11:49:35,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:35,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:35,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:35,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:36,239 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:36,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:36,240 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:36,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:36,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:36,341 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:36,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-24 11:49:36,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:49:36,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:49:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:49:36,342 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 11 states. [2018-10-24 11:49:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:36,596 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-24 11:49:36,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:49:36,598 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-10-24 11:49:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:36,599 INFO L225 Difference]: With dead ends: 62 [2018-10-24 11:49:36,599 INFO L226 Difference]: Without dead ends: 56 [2018-10-24 11:49:36,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:49:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-24 11:49:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-10-24 11:49:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-24 11:49:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-24 11:49:36,606 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2018-10-24 11:49:36,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:36,606 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-24 11:49:36,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:49:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-24 11:49:36,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-24 11:49:36,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:36,608 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:36,608 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:36,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:36,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1793517205, now seen corresponding path program 8 times [2018-10-24 11:49:36,609 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:36,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:36,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:36,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:36,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:36,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:36,890 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:36,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:36,959 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:36,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:36,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:37,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:37,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-24 11:49:37,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:49:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:49:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:49:37,020 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 12 states. [2018-10-24 11:49:37,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:37,129 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-24 11:49:37,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:49:37,130 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-24 11:49:37,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:37,131 INFO L225 Difference]: With dead ends: 67 [2018-10-24 11:49:37,132 INFO L226 Difference]: Without dead ends: 61 [2018-10-24 11:49:37,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:49:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-24 11:49:37,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2018-10-24 11:49:37,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-24 11:49:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-24 11:49:37,138 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2018-10-24 11:49:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:37,138 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-24 11:49:37,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:49:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-24 11:49:37,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-24 11:49:37,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:37,140 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:37,140 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:37,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash 409628651, now seen corresponding path program 9 times [2018-10-24 11:49:37,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:37,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:37,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:37,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:37,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:37,313 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:37,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:37,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-24 11:49:37,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:37,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:37,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:37,471 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-24 11:49:37,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:49:37,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:49:37,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:49:37,473 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 13 states. [2018-10-24 11:49:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:37,581 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-24 11:49:37,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:49:37,582 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-10-24 11:49:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:37,583 INFO L225 Difference]: With dead ends: 72 [2018-10-24 11:49:37,583 INFO L226 Difference]: Without dead ends: 66 [2018-10-24 11:49:37,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:49:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-24 11:49:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-10-24 11:49:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-24 11:49:37,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-24 11:49:37,591 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2018-10-24 11:49:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:37,591 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-24 11:49:37,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:49:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-24 11:49:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-24 11:49:37,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:37,593 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:37,593 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:37,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1082831787, now seen corresponding path program 10 times [2018-10-24 11:49:37,594 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:37,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:37,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:37,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:37,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:37,828 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:37,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:49:37,908 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:49:37,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:37,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:37,972 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:37,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-24 11:49:37,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:49:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:49:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:49:37,974 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 14 states. [2018-10-24 11:49:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:38,126 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-24 11:49:38,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:49:38,127 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2018-10-24 11:49:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:38,128 INFO L225 Difference]: With dead ends: 77 [2018-10-24 11:49:38,128 INFO L226 Difference]: Without dead ends: 71 [2018-10-24 11:49:38,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:49:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-24 11:49:38,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2018-10-24 11:49:38,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-24 11:49:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-24 11:49:38,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2018-10-24 11:49:38,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:38,136 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-24 11:49:38,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:49:38,136 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-24 11:49:38,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-24 11:49:38,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:38,137 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:38,137 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:38,138 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:38,138 INFO L82 PathProgramCache]: Analyzing trace with hash 230007339, now seen corresponding path program 11 times [2018-10-24 11:49:38,138 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:38,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:38,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:38,139 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:38,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:38,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:38,396 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:38,405 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:49:38,499 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-24 11:49:38,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:38,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:38,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:38,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-24 11:49:38,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-24 11:49:38,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-24 11:49:38,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:49:38,572 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 15 states. [2018-10-24 11:49:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:38,698 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-24 11:49:38,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-24 11:49:38,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2018-10-24 11:49:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:38,699 INFO L225 Difference]: With dead ends: 82 [2018-10-24 11:49:38,700 INFO L226 Difference]: Without dead ends: 76 [2018-10-24 11:49:38,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-24 11:49:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-24 11:49:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-10-24 11:49:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-24 11:49:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-24 11:49:38,705 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2018-10-24 11:49:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:38,706 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-24 11:49:38,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-24 11:49:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-24 11:49:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-24 11:49:38,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:38,707 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:38,708 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:38,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash 546275861, now seen corresponding path program 12 times [2018-10-24 11:49:38,708 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:38,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:38,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:38,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:38,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:39,750 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:39,751 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:39,760 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:49:39,954 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-24 11:49:39,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:39,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:40,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:40,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-24 11:49:40,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:49:40,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:49:40,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:49:40,033 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 16 states. [2018-10-24 11:49:40,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:40,207 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-24 11:49:40,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:49:40,208 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2018-10-24 11:49:40,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:40,209 INFO L225 Difference]: With dead ends: 87 [2018-10-24 11:49:40,209 INFO L226 Difference]: Without dead ends: 81 [2018-10-24 11:49:40,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:49:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-24 11:49:40,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-10-24 11:49:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-24 11:49:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-24 11:49:40,219 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2018-10-24 11:49:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:40,219 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-24 11:49:40,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:49:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-24 11:49:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-24 11:49:40,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:40,220 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:40,221 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:40,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:40,221 INFO L82 PathProgramCache]: Analyzing trace with hash 89588843, now seen corresponding path program 13 times [2018-10-24 11:49:40,221 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:40,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:40,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:40,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:40,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:40,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:40,618 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:40,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:40,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:40,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:40,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-24 11:49:40,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:49:40,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:49:40,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:49:40,762 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 17 states. [2018-10-24 11:49:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:41,171 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-24 11:49:41,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:49:41,171 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2018-10-24 11:49:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:41,172 INFO L225 Difference]: With dead ends: 92 [2018-10-24 11:49:41,172 INFO L226 Difference]: Without dead ends: 86 [2018-10-24 11:49:41,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:49:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-24 11:49:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-24 11:49:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-24 11:49:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-24 11:49:41,183 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2018-10-24 11:49:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:41,183 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-24 11:49:41,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:49:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-24 11:49:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-24 11:49:41,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:41,185 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:41,185 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:41,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1840351189, now seen corresponding path program 14 times [2018-10-24 11:49:41,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:41,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:41,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:41,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:41,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:41,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:41,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:41,537 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:41,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:41,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:41,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:41,601 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-24 11:49:41,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:49:41,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:49:41,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:49:41,602 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 18 states. [2018-10-24 11:49:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:41,760 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-24 11:49:41,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:49:41,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-10-24 11:49:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:41,761 INFO L225 Difference]: With dead ends: 97 [2018-10-24 11:49:41,761 INFO L226 Difference]: Without dead ends: 91 [2018-10-24 11:49:41,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:49:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-24 11:49:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-10-24 11:49:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-24 11:49:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-24 11:49:41,767 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2018-10-24 11:49:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:41,767 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-24 11:49:41,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:49:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-24 11:49:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-24 11:49:41,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:41,768 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:41,769 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:41,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:41,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1834129067, now seen corresponding path program 15 times [2018-10-24 11:49:41,769 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:41,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:41,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:41,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:42,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:42,104 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:42,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:42,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-24 11:49:42,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:42,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:42,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:42,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-24 11:49:42,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:49:42,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:49:42,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:49:42,450 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 19 states. [2018-10-24 11:49:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:42,685 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-24 11:49:42,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:49:42,686 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-10-24 11:49:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:42,687 INFO L225 Difference]: With dead ends: 102 [2018-10-24 11:49:42,687 INFO L226 Difference]: Without dead ends: 96 [2018-10-24 11:49:42,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:49:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-24 11:49:42,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-10-24 11:49:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-24 11:49:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-24 11:49:42,692 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2018-10-24 11:49:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:42,692 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-24 11:49:42,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:49:42,692 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-24 11:49:42,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-24 11:49:42,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:42,693 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:42,695 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:42,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:42,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1532452245, now seen corresponding path program 16 times [2018-10-24 11:49:42,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:42,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:42,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:42,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:42,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:42,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:42,971 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:42,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:49:43,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:49:43,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:43,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:43,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:43,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-24 11:49:43,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:49:43,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:49:43,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:49:43,127 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 20 states. [2018-10-24 11:49:43,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:43,287 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-24 11:49:43,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:49:43,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2018-10-24 11:49:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:43,289 INFO L225 Difference]: With dead ends: 107 [2018-10-24 11:49:43,290 INFO L226 Difference]: Without dead ends: 101 [2018-10-24 11:49:43,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:49:43,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-24 11:49:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2018-10-24 11:49:43,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-24 11:49:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-24 11:49:43,293 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2018-10-24 11:49:43,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:43,294 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-24 11:49:43,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:49:43,294 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-24 11:49:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-24 11:49:43,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:43,295 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:43,295 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:43,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:43,296 INFO L82 PathProgramCache]: Analyzing trace with hash -22259477, now seen corresponding path program 17 times [2018-10-24 11:49:43,296 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:43,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:43,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:43,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:43,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:43,655 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:43,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:49:43,833 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-24 11:49:43,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:43,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:43,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:43,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-24 11:49:43,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-24 11:49:43,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-24 11:49:43,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:49:43,884 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 21 states. [2018-10-24 11:49:44,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:44,052 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-24 11:49:44,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:49:44,053 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2018-10-24 11:49:44,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:44,054 INFO L225 Difference]: With dead ends: 112 [2018-10-24 11:49:44,055 INFO L226 Difference]: Without dead ends: 106 [2018-10-24 11:49:44,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-24 11:49:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-24 11:49:44,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2018-10-24 11:49:44,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-24 11:49:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-24 11:49:44,059 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2018-10-24 11:49:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:44,059 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-24 11:49:44,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-24 11:49:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-24 11:49:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-24 11:49:44,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:44,060 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:44,060 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:44,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash 855442261, now seen corresponding path program 18 times [2018-10-24 11:49:44,061 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:44,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:44,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:44,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:44,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:44,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:44,802 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:44,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:49:45,359 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-24 11:49:45,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:45,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:45,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:45,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-24 11:49:45,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:49:45,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:49:45,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:49:45,449 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 22 states. [2018-10-24 11:49:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:45,657 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-24 11:49:45,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:49:45,657 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2018-10-24 11:49:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:45,659 INFO L225 Difference]: With dead ends: 117 [2018-10-24 11:49:45,659 INFO L226 Difference]: Without dead ends: 111 [2018-10-24 11:49:45,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:49:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-24 11:49:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2018-10-24 11:49:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-24 11:49:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-24 11:49:45,663 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2018-10-24 11:49:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:45,664 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-24 11:49:45,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:49:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-24 11:49:45,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-24 11:49:45,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:45,665 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:45,665 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:45,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash -43496661, now seen corresponding path program 19 times [2018-10-24 11:49:45,665 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:45,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:45,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:45,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:45,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:46,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:46,073 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:46,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:46,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:46,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:46,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:46,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-24 11:49:46,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:49:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:49:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:49:46,295 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 23 states. [2018-10-24 11:49:46,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:46,446 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-24 11:49:46,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:49:46,447 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-24 11:49:46,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:46,448 INFO L225 Difference]: With dead ends: 122 [2018-10-24 11:49:46,448 INFO L226 Difference]: Without dead ends: 116 [2018-10-24 11:49:46,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:49:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-24 11:49:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2018-10-24 11:49:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-24 11:49:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-24 11:49:46,453 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2018-10-24 11:49:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:46,454 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-24 11:49:46,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:49:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-24 11:49:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-24 11:49:46,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:46,455 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:46,455 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:46,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1826719467, now seen corresponding path program 20 times [2018-10-24 11:49:46,456 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:46,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:46,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:47,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:47,143 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:47,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:49:47,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:49:47,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:47,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:47,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:47,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-24 11:49:47,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:49:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:49:47,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:49:47,295 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 24 states. [2018-10-24 11:49:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:47,452 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-24 11:49:47,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:49:47,454 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2018-10-24 11:49:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:47,456 INFO L225 Difference]: With dead ends: 127 [2018-10-24 11:49:47,456 INFO L226 Difference]: Without dead ends: 121 [2018-10-24 11:49:47,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:49:47,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-24 11:49:47,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2018-10-24 11:49:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-24 11:49:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-24 11:49:47,460 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2018-10-24 11:49:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:47,460 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-24 11:49:47,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:49:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-24 11:49:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-24 11:49:47,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:47,461 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:47,461 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:47,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2022337899, now seen corresponding path program 21 times [2018-10-24 11:49:47,462 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:47,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:47,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:47,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:47,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:47,788 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:47,788 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:47,795 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:49:49,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-24 11:49:49,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:49,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:49,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:49,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:49,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-24 11:49:49,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:49:49,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:49:49,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:49:49,972 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 25 states. [2018-10-24 11:49:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:50,169 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-24 11:49:50,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:49:50,170 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2018-10-24 11:49:50,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:50,171 INFO L225 Difference]: With dead ends: 132 [2018-10-24 11:49:50,171 INFO L226 Difference]: Without dead ends: 126 [2018-10-24 11:49:50,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:49:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-24 11:49:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2018-10-24 11:49:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-24 11:49:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-24 11:49:50,176 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2018-10-24 11:49:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:50,176 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-24 11:49:50,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:49:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-24 11:49:50,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-24 11:49:50,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:50,177 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:50,178 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:50,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:50,178 INFO L82 PathProgramCache]: Analyzing trace with hash 792182485, now seen corresponding path program 22 times [2018-10-24 11:49:50,178 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:50,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:50,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:50,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:50,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:50,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:50,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:50,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:49:50,600 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:49:50,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:50,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:50,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:50,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-24 11:49:50,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:49:50,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:49:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:49:50,669 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 26 states. [2018-10-24 11:49:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:50,900 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-24 11:49:50,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:49:50,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 122 [2018-10-24 11:49:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:50,902 INFO L225 Difference]: With dead ends: 137 [2018-10-24 11:49:50,902 INFO L226 Difference]: Without dead ends: 131 [2018-10-24 11:49:50,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:49:50,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-24 11:49:50,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2018-10-24 11:49:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-24 11:49:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-24 11:49:50,905 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2018-10-24 11:49:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:50,906 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-24 11:49:50,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:49:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-24 11:49:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-24 11:49:50,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:50,907 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:50,907 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:50,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:50,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1978220629, now seen corresponding path program 23 times [2018-10-24 11:49:50,908 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:50,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:50,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:50,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:50,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:51,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:51,277 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:51,284 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:49:51,671 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-24 11:49:51,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:51,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:51,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:51,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:51,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-24 11:49:51,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-24 11:49:51,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-24 11:49:51,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:49:51,732 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 27 states. [2018-10-24 11:49:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:51,950 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-24 11:49:51,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:49:51,951 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 127 [2018-10-24 11:49:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:51,951 INFO L225 Difference]: With dead ends: 142 [2018-10-24 11:49:51,951 INFO L226 Difference]: Without dead ends: 136 [2018-10-24 11:49:51,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:49:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-24 11:49:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2018-10-24 11:49:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-24 11:49:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-24 11:49:51,956 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2018-10-24 11:49:51,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:51,956 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-24 11:49:51,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-24 11:49:51,956 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-24 11:49:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-24 11:49:51,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:51,957 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:51,957 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:51,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:51,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1882925931, now seen corresponding path program 24 times [2018-10-24 11:49:51,958 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:51,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:51,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:51,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:51,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:52,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:52,612 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:52,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:49:56,955 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-24 11:49:56,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:49:56,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:57,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:57,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:57,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-24 11:49:57,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:49:57,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:49:57,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:49:57,045 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 28 states. [2018-10-24 11:49:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:57,350 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-24 11:49:57,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:49:57,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 132 [2018-10-24 11:49:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:57,351 INFO L225 Difference]: With dead ends: 147 [2018-10-24 11:49:57,351 INFO L226 Difference]: Without dead ends: 141 [2018-10-24 11:49:57,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:49:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-24 11:49:57,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2018-10-24 11:49:57,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-24 11:49:57,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-24 11:49:57,355 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2018-10-24 11:49:57,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:57,355 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-24 11:49:57,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:49:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-24 11:49:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-24 11:49:57,356 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:57,356 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:57,356 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:57,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1760476693, now seen corresponding path program 25 times [2018-10-24 11:49:57,357 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:57,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:57,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:57,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:49:57,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:59,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:49:59,254 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:49:59,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:49:59,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:49:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:49:59,424 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:49:59,424 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-24 11:49:59,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:49:59,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:49:59,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:49:59,425 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 29 states. [2018-10-24 11:49:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:49:59,603 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-10-24 11:49:59,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:49:59,604 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2018-10-24 11:49:59,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:49:59,605 INFO L225 Difference]: With dead ends: 152 [2018-10-24 11:49:59,605 INFO L226 Difference]: Without dead ends: 146 [2018-10-24 11:49:59,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:49:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-24 11:49:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2018-10-24 11:49:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-24 11:49:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-24 11:49:59,610 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2018-10-24 11:49:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:49:59,610 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-24 11:49:59,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:49:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-24 11:49:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-24 11:49:59,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:49:59,620 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:49:59,620 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:49:59,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:49:59,621 INFO L82 PathProgramCache]: Analyzing trace with hash -767444395, now seen corresponding path program 26 times [2018-10-24 11:49:59,621 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:49:59,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:49:59,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:59,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:49:59,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:49:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:00,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:00,697 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:00,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:50:00,793 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:50:00,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:00,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:00,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:00,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-24 11:50:00,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 11:50:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 11:50:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:50:00,892 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 30 states. [2018-10-24 11:50:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:01,365 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-24 11:50:01,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:50:01,366 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2018-10-24 11:50:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:01,367 INFO L225 Difference]: With dead ends: 157 [2018-10-24 11:50:01,368 INFO L226 Difference]: Without dead ends: 151 [2018-10-24 11:50:01,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:50:01,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-24 11:50:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2018-10-24 11:50:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-24 11:50:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-24 11:50:01,372 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2018-10-24 11:50:01,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:01,373 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-24 11:50:01,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 11:50:01,373 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-24 11:50:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-24 11:50:01,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:01,374 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:01,374 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:01,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:01,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1887570901, now seen corresponding path program 27 times [2018-10-24 11:50:01,375 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:01,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:01,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:01,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:01,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:03,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:03,099 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:03,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:50:10,372 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-24 11:50:10,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:10,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:10,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:10,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:10,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-24 11:50:10,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:50:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:50:10,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:50:10,458 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 31 states. [2018-10-24 11:50:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:10,632 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-24 11:50:10,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 11:50:10,633 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2018-10-24 11:50:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:10,634 INFO L225 Difference]: With dead ends: 162 [2018-10-24 11:50:10,634 INFO L226 Difference]: Without dead ends: 156 [2018-10-24 11:50:10,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:50:10,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-24 11:50:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-10-24 11:50:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-24 11:50:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-24 11:50:10,639 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2018-10-24 11:50:10,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:10,640 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-24 11:50:10,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:50:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-24 11:50:10,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-24 11:50:10,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:10,641 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:10,641 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:10,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:10,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1764388885, now seen corresponding path program 28 times [2018-10-24 11:50:10,642 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:10,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:10,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:10,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:10,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:11,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:11,745 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:11,754 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:50:11,900 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:50:11,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:11,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:11,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:11,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-24 11:50:11,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:50:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:50:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:50:11,962 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 32 states. [2018-10-24 11:50:12,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:12,175 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-24 11:50:12,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:50:12,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 152 [2018-10-24 11:50:12,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:12,177 INFO L225 Difference]: With dead ends: 167 [2018-10-24 11:50:12,178 INFO L226 Difference]: Without dead ends: 161 [2018-10-24 11:50:12,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:50:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-24 11:50:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-10-24 11:50:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-24 11:50:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-24 11:50:12,183 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2018-10-24 11:50:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:12,183 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-24 11:50:12,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:50:12,183 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-24 11:50:12,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-24 11:50:12,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:12,184 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:12,184 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:12,185 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:12,185 INFO L82 PathProgramCache]: Analyzing trace with hash 778098283, now seen corresponding path program 29 times [2018-10-24 11:50:12,185 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:12,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:12,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:12,186 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:12,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:12,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:12,950 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:12,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:50:17,199 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-24 11:50:17,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:17,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:17,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:17,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-24 11:50:17,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-24 11:50:17,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-24 11:50:17,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:50:17,397 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 33 states. [2018-10-24 11:50:18,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:18,363 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-24 11:50:18,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:50:18,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2018-10-24 11:50:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:18,365 INFO L225 Difference]: With dead ends: 172 [2018-10-24 11:50:18,366 INFO L226 Difference]: Without dead ends: 166 [2018-10-24 11:50:18,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 11:50:18,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-24 11:50:18,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2018-10-24 11:50:18,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-24 11:50:18,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-24 11:50:18,371 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2018-10-24 11:50:18,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:18,372 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-24 11:50:18,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-24 11:50:18,372 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-24 11:50:18,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-24 11:50:18,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:18,373 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:18,373 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:18,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:18,374 INFO L82 PathProgramCache]: Analyzing trace with hash -604310059, now seen corresponding path program 30 times [2018-10-24 11:50:18,374 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:18,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:18,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:18,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:18,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:18,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:18,924 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:18,933 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:50:47,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-24 11:50:47,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:47,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:48,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:48,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-24 11:50:48,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:50:48,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:50:48,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:50:48,015 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 34 states. [2018-10-24 11:50:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:48,394 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-24 11:50:48,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 11:50:48,394 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2018-10-24 11:50:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:48,395 INFO L225 Difference]: With dead ends: 177 [2018-10-24 11:50:48,395 INFO L226 Difference]: Without dead ends: 171 [2018-10-24 11:50:48,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:50:48,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-24 11:50:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2018-10-24 11:50:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-24 11:50:48,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-10-24 11:50:48,400 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2018-10-24 11:50:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:48,400 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-10-24 11:50:48,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:50:48,401 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-10-24 11:50:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-24 11:50:48,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:48,402 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:48,402 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:48,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:48,402 INFO L82 PathProgramCache]: Analyzing trace with hash 968747179, now seen corresponding path program 31 times [2018-10-24 11:50:48,402 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:48,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:48,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:48,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:48,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:49,365 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:49,365 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:49,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:50:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:49,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:49,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:49,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:49,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-24 11:50:49,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:50:49,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:50:49,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:50:49,617 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 35 states. [2018-10-24 11:50:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:50,427 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-24 11:50:50,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:50:50,427 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2018-10-24 11:50:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:50,429 INFO L225 Difference]: With dead ends: 182 [2018-10-24 11:50:50,429 INFO L226 Difference]: Without dead ends: 176 [2018-10-24 11:50:50,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:50:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-24 11:50:50,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2018-10-24 11:50:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-24 11:50:50,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-24 11:50:50,434 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2018-10-24 11:50:50,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:50,434 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-24 11:50:50,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:50:50,435 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-24 11:50:50,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-24 11:50:50,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:50,436 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:50,436 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:50,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2026943595, now seen corresponding path program 32 times [2018-10-24 11:50:50,437 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:50,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:50,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:50,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:50:50,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:51,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:51,069 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:51,069 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:51,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:50:51,171 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:50:51,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:50:51,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:50:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:51,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:50:51,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-24 11:50:51,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-24 11:50:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-24 11:50:51,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:50:51,271 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 36 states. [2018-10-24 11:50:51,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:50:51,575 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-24 11:50:51,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-24 11:50:51,575 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 172 [2018-10-24 11:50:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:50:51,577 INFO L225 Difference]: With dead ends: 187 [2018-10-24 11:50:51,577 INFO L226 Difference]: Without dead ends: 181 [2018-10-24 11:50:51,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-24 11:50:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-24 11:50:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2018-10-24 11:50:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-24 11:50:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-24 11:50:51,582 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2018-10-24 11:50:51,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:50:51,583 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-24 11:50:51,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-24 11:50:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-24 11:50:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-24 11:50:51,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:50:51,584 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:50:51,584 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:50:51,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:50:51,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1030149397, now seen corresponding path program 33 times [2018-10-24 11:50:51,584 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:50:51,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:50:51,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:51,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:50:51,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:50:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:50:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:50:52,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:50:52,337 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:50:52,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:51:00,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-24 11:51:00,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:00,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:51:00,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:00,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-24 11:51:00,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:51:00,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:51:00,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:51:00,765 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 37 states. [2018-10-24 11:51:01,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:01,060 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-10-24 11:51:01,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 11:51:01,060 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 177 [2018-10-24 11:51:01,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:01,062 INFO L225 Difference]: With dead ends: 192 [2018-10-24 11:51:01,063 INFO L226 Difference]: Without dead ends: 186 [2018-10-24 11:51:01,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:51:01,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-24 11:51:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2018-10-24 11:51:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-24 11:51:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-24 11:51:01,068 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2018-10-24 11:51:01,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:01,068 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-24 11:51:01,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:51:01,068 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-24 11:51:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-24 11:51:01,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:01,070 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:01,070 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:01,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:01,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1547923797, now seen corresponding path program 34 times [2018-10-24 11:51:01,070 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:01,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:01,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:01,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:01,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:51:01,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:01,869 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:01,878 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:51:02,071 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:51:02,071 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:02,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:51:02,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:02,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-24 11:51:02,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:51:02,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:51:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:51:02,237 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 38 states. [2018-10-24 11:51:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:03,252 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-24 11:51:03,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-24 11:51:03,253 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 182 [2018-10-24 11:51:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:03,254 INFO L225 Difference]: With dead ends: 197 [2018-10-24 11:51:03,254 INFO L226 Difference]: Without dead ends: 191 [2018-10-24 11:51:03,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:51:03,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-24 11:51:03,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2018-10-24 11:51:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-24 11:51:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-24 11:51:03,264 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2018-10-24 11:51:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:03,264 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-24 11:51:03,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:51:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-24 11:51:03,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-24 11:51:03,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:03,266 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:03,266 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:03,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:03,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1693883691, now seen corresponding path program 35 times [2018-10-24 11:51:03,266 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:03,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:03,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:03,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:03,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:51:04,256 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:04,256 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:04,264 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:51:06,642 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-24 11:51:06,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:06,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:51:06,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:06,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-24 11:51:06,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-24 11:51:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-24 11:51:06,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:51:06,819 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 39 states. [2018-10-24 11:51:07,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:07,096 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-24 11:51:07,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 11:51:07,096 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 187 [2018-10-24 11:51:07,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:07,098 INFO L225 Difference]: With dead ends: 202 [2018-10-24 11:51:07,098 INFO L226 Difference]: Without dead ends: 196 [2018-10-24 11:51:07,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-24 11:51:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-24 11:51:07,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2018-10-24 11:51:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-24 11:51:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-24 11:51:07,103 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2018-10-24 11:51:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:07,103 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-24 11:51:07,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-24 11:51:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-24 11:51:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-24 11:51:07,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:07,105 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:07,105 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:07,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1582078187, now seen corresponding path program 36 times [2018-10-24 11:51:07,105 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:07,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:07,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:07,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:07,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:51:08,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:08,650 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:08,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:52:14,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-24 11:52:14,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:14,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:52:14,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:14,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-24 11:52:14,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:52:14,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:52:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:52:14,542 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 40 states. [2018-10-24 11:52:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:15,697 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-24 11:52:15,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:52:15,698 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 192 [2018-10-24 11:52:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:15,699 INFO L225 Difference]: With dead ends: 207 [2018-10-24 11:52:15,699 INFO L226 Difference]: Without dead ends: 201 [2018-10-24 11:52:15,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:52:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-24 11:52:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2018-10-24 11:52:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-24 11:52:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-10-24 11:52:15,703 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2018-10-24 11:52:15,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:15,703 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-10-24 11:52:15,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:52:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-10-24 11:52:15,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-24 11:52:15,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:15,704 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:15,704 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:15,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:15,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2015740053, now seen corresponding path program 37 times [2018-10-24 11:52:15,705 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:15,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:15,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:15,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:15,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:52:16,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:16,525 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:16,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:16,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:52:16,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:16,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-24 11:52:16,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:52:16,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:52:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:52:16,722 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 41 states. [2018-10-24 11:52:17,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:17,011 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2018-10-24 11:52:17,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 11:52:17,011 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 197 [2018-10-24 11:52:17,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:17,014 INFO L225 Difference]: With dead ends: 212 [2018-10-24 11:52:17,014 INFO L226 Difference]: Without dead ends: 206 [2018-10-24 11:52:17,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:52:17,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-24 11:52:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2018-10-24 11:52:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-24 11:52:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-24 11:52:17,019 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2018-10-24 11:52:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:17,019 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-24 11:52:17,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:52:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-24 11:52:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-24 11:52:17,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:17,021 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:17,021 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:17,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1292161835, now seen corresponding path program 38 times [2018-10-24 11:52:17,022 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:17,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:17,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:17,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:17,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:52:17,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:17,737 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:17,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:52:17,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:52:17,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:17,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:52:17,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:17,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-24 11:52:17,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:52:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:52:17,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:52:17,959 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 42 states. [2018-10-24 11:52:18,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:18,346 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-24 11:52:18,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:52:18,347 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 202 [2018-10-24 11:52:18,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:18,349 INFO L225 Difference]: With dead ends: 217 [2018-10-24 11:52:18,349 INFO L226 Difference]: Without dead ends: 211 [2018-10-24 11:52:18,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:52:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-24 11:52:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2018-10-24 11:52:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-24 11:52:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-24 11:52:18,354 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2018-10-24 11:52:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:18,354 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-24 11:52:18,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:52:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-24 11:52:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-24 11:52:18,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:18,356 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:18,356 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:18,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1656221269, now seen corresponding path program 39 times [2018-10-24 11:52:18,356 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:18,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:18,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:18,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:18,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:52:19,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:19,307 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:19,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:53:18,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-24 11:53:18,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:18,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:18,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:18,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-24 11:53:18,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:53:18,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:53:18,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:53:18,638 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 43 states. [2018-10-24 11:53:18,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:18,948 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2018-10-24 11:53:18,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 11:53:18,948 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 207 [2018-10-24 11:53:18,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:18,950 INFO L225 Difference]: With dead ends: 222 [2018-10-24 11:53:18,950 INFO L226 Difference]: Without dead ends: 216 [2018-10-24 11:53:18,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:53:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-24 11:53:18,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2018-10-24 11:53:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-24 11:53:18,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-10-24 11:53:18,955 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 207 [2018-10-24 11:53:18,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:18,955 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-10-24 11:53:18,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:53:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-10-24 11:53:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-24 11:53:18,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:18,956 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:18,956 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:18,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:18,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1063861611, now seen corresponding path program 40 times [2018-10-24 11:53:18,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:18,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:18,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:18,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:18,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:19,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:19,764 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:19,772 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:53:20,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:53:20,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:20,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:20,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:20,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-24 11:53:20,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:53:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:53:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:53:20,155 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 44 states. [2018-10-24 11:53:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:20,524 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-10-24 11:53:20,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 11:53:20,524 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2018-10-24 11:53:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:20,526 INFO L225 Difference]: With dead ends: 227 [2018-10-24 11:53:20,526 INFO L226 Difference]: Without dead ends: 221 [2018-10-24 11:53:20,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:53:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-24 11:53:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2018-10-24 11:53:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-24 11:53:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-24 11:53:20,531 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 212 [2018-10-24 11:53:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:20,531 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-24 11:53:20,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:53:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-24 11:53:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-24 11:53:20,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:20,532 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:20,532 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:20,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1648628715, now seen corresponding path program 41 times [2018-10-24 11:53:20,533 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:20,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:20,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:21,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:21,937 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:21,945 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:53:29,209 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-24 11:53:29,210 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:29,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:29,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:29,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-24 11:53:29,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-24 11:53:29,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-24 11:53:29,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:53:29,417 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 45 states. [2018-10-24 11:53:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:29,766 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-24 11:53:29,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-24 11:53:29,767 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 217 [2018-10-24 11:53:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:29,768 INFO L225 Difference]: With dead ends: 232 [2018-10-24 11:53:29,769 INFO L226 Difference]: Without dead ends: 226 [2018-10-24 11:53:29,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-24 11:53:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-24 11:53:29,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2018-10-24 11:53:29,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-24 11:53:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-24 11:53:29,789 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 217 [2018-10-24 11:53:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:29,790 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-24 11:53:29,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-24 11:53:29,790 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-24 11:53:29,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-24 11:53:29,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:29,791 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:29,791 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:29,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:29,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1878906795, now seen corresponding path program 42 times [2018-10-24 11:53:29,792 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:29,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:29,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:29,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:29,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:53:30,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:30,624 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:30,631 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown