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-new/count_by_k_true-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:59:51,492 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:59:51,494 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:59:51,507 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:59:51,510 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:59:51,511 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:59:51,513 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:59:51,516 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:59:51,518 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:59:51,519 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:59:51,524 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:59:51,524 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:59:51,525 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:59:51,526 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:59:51,531 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:59:51,532 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:59:51,533 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:59:51,537 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:59:51,541 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:59:51,544 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:59:51,545 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:59:51,546 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:59:51,548 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-24 11:59:51,549 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-24 11:59:51,549 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-24 11:59:51,550 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-24 11:59:51,551 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-24 11:59:51,551 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-24 11:59:51,552 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-24 11:59:51,553 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-24 11:59:51,553 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-24 11:59:51,554 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-24 11:59:51,554 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-24 11:59:51,554 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-24 11:59:51,555 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-24 11:59:51,556 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-24 11:59:51,556 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 11:59:51,571 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:59:51,571 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:59:51,572 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:59:51,572 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:59:51,573 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:59:51,573 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:59:51,573 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:59:51,573 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:59:51,574 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:59:51,574 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:59:51,574 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:59:51,574 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:59:51,574 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:59:51,575 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:59:51,575 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:59:51,575 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:59:51,575 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:59:51,575 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:59:51,576 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:59:51,576 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:59:51,576 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:59:51,576 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:59:51,576 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:59:51,577 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:59:51,577 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:59:51,577 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:59:51,577 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:59:51,577 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:59:51,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:59:51,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:59:51,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:59:51,658 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:59:51,658 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:59:51,659 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-10-24 11:59:51,725 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2f5925ebf/70ad2b6f4f0e49f29ad9140f4d959f26/FLAG77a0a2ba2 [2018-10-24 11:59:52,224 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:59:52,225 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_k_true-unreach-call_true-termination.i [2018-10-24 11:59:52,230 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2f5925ebf/70ad2b6f4f0e49f29ad9140f4d959f26/FLAG77a0a2ba2 [2018-10-24 11:59:52,248 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/2f5925ebf/70ad2b6f4f0e49f29ad9140f4d959f26 [2018-10-24 11:59:52,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:59:52,263 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:59:52,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:59:52,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:59:52,268 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:59:52,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c49ecf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52, skipping insertion in model container [2018-10-24 11:59:52,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:59:52,299 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:59:52,521 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:59:52,525 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:59:52,547 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:59:52,564 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:59:52,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52 WrapperNode [2018-10-24 11:59:52,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:59:52,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:59:52,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:59:52,566 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:59:52,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:59:52,604 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:59:52,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:59:52,604 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:59:52,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (1/1) ... [2018-10-24 11:59:52,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:59:52,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:59:52,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:59:52,630 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:59:52,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (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 11:59:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:59:52,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:59:52,955 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:59:52,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:59:52 BoogieIcfgContainer [2018-10-24 11:59:52,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:59:52,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:59:52,959 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:59:52,962 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:59:52,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:59:52" (1/3) ... [2018-10-24 11:59:52,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dcd54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:59:52, skipping insertion in model container [2018-10-24 11:59:52,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:59:52" (2/3) ... [2018-10-24 11:59:52,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dcd54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:59:52, skipping insertion in model container [2018-10-24 11:59:52,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:59:52" (3/3) ... [2018-10-24 11:59:52,965 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_k_true-unreach-call_true-termination.i [2018-10-24 11:59:52,976 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:59:52,986 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:59:52,999 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:59:53,030 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:59:53,031 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:59:53,031 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:59:53,031 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:59:53,031 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:59:53,032 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:59:53,032 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:59:53,032 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:59:53,032 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:59:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2018-10-24 11:59:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-24 11:59:53,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,056 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,058 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1807151048, now seen corresponding path program 1 times [2018-10-24 11:59:53,069 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,179 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 11:59:53,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:53,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:59:53,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:59:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:59:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:59:53,206 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 2 states. [2018-10-24 11:59:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:53,224 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2018-10-24 11:59:53,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:59:53,225 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-24 11:59:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:53,236 INFO L225 Difference]: With dead ends: 22 [2018-10-24 11:59:53,236 INFO L226 Difference]: Without dead ends: 10 [2018-10-24 11:59:53,240 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 11:59:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-24 11:59:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-24 11:59:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-24 11:59:53,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-24 11:59:53,276 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2018-10-24 11:59:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:53,277 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-24 11:59:53,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:59:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-24 11:59:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-24 11:59:53,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,278 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,278 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash 178554705, now seen corresponding path program 1 times [2018-10-24 11:59:53,279 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,477 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-24 11:59:53,608 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 11:59:53,609 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:59:53,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 11:59:53,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:59:53,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:59:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:59:53,612 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 5 states. [2018-10-24 11:59:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:53,740 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-24 11:59:53,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 11:59:53,741 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-24 11:59:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:53,742 INFO L225 Difference]: With dead ends: 16 [2018-10-24 11:59:53,742 INFO L226 Difference]: Without dead ends: 12 [2018-10-24 11:59:53,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-10-24 11:59:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-24 11:59:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-24 11:59:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-24 11:59:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-24 11:59:53,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2018-10-24 11:59:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:53,753 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-24 11:59:53,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:59:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-24 11:59:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 11:59:53,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:53,755 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:53,755 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:53,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:53,756 INFO L82 PathProgramCache]: Analyzing trace with hash -494066964, now seen corresponding path program 1 times [2018-10-24 11:59:53,756 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:53,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:53,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,848 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 11:59:53,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:53,849 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 11:59:53,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:53,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:54,101 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 11:59:54,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:54,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-24 11:59:54,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:59:54,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:59:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:59:54,126 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-10-24 11:59:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:54,414 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2018-10-24 11:59:54,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:59:54,415 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-24 11:59:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:54,416 INFO L225 Difference]: With dead ends: 25 [2018-10-24 11:59:54,416 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 11:59:54,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:59:54,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 11:59:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-24 11:59:54,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 11:59:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-24 11:59:54,422 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 11 [2018-10-24 11:59:54,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:54,422 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-24 11:59:54,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:59:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-24 11:59:54,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 11:59:54,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:54,423 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:54,424 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:54,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:54,424 INFO L82 PathProgramCache]: Analyzing trace with hash 211590033, now seen corresponding path program 2 times [2018-10-24 11:59:54,424 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:54,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:54,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:59:54,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:54,610 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 11:59:54,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:59:54,636 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:59:54,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:54,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:54,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:54,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-10-24 11:59:54,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:59:54,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:59:54,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:59:54,803 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2018-10-24 11:59:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:55,458 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-24 11:59:55,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:59:55,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-24 11:59:55,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:55,460 INFO L225 Difference]: With dead ends: 34 [2018-10-24 11:59:55,460 INFO L226 Difference]: Without dead ends: 30 [2018-10-24 11:59:55,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:59:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-24 11:59:55,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-24 11:59:55,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-24 11:59:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-24 11:59:55,468 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 20 [2018-10-24 11:59:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:55,468 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-24 11:59:55,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:59:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-24 11:59:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-24 11:59:55,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:55,470 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:55,470 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:55,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:55,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1547039604, now seen corresponding path program 3 times [2018-10-24 11:59:55,471 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:55,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:55,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:55,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:55,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:55,723 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 11:59:55,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:59:55,833 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-24 11:59:55,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:55,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:55,997 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:56,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:56,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2018-10-24 11:59:56,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:59:56,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:59:56,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:59:56,020 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 13 states. [2018-10-24 11:59:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:56,584 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-24 11:59:56,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:59:56,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2018-10-24 11:59:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:56,585 INFO L225 Difference]: With dead ends: 43 [2018-10-24 11:59:56,585 INFO L226 Difference]: Without dead ends: 39 [2018-10-24 11:59:56,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:59:56,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-24 11:59:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-24 11:59:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-24 11:59:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-24 11:59:56,597 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 29 [2018-10-24 11:59:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:56,598 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-24 11:59:56,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:59:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-24 11:59:56,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-24 11:59:56,599 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:56,600 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:56,600 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:56,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1958512113, now seen corresponding path program 4 times [2018-10-24 11:59:56,601 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:56,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:56,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:56,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:56,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:57,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:57,429 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 11:59:57,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:59:57,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:59:57,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:57,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:58,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:58,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-10-24 11:59:58,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:59:58,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:59:58,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:59:58,090 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 25 states. [2018-10-24 11:59:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:59:59,181 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-10-24 11:59:59,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:59:59,187 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 38 [2018-10-24 11:59:59,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:59:59,188 INFO L225 Difference]: With dead ends: 52 [2018-10-24 11:59:59,188 INFO L226 Difference]: Without dead ends: 48 [2018-10-24 11:59:59,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2018-10-24 11:59:59,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-24 11:59:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-24 11:59:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-24 11:59:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-24 11:59:59,198 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2018-10-24 11:59:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:59:59,199 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-24 11:59:59,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:59:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-24 11:59:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-24 11:59:59,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:59:59,201 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:59:59,201 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:59:59,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:59:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1417949652, now seen corresponding path program 5 times [2018-10-24 11:59:59,202 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:59:59,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:59:59,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:59:59,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:59:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:59:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:59,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:59:59,494 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:59:59,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:59:59,540 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-24 11:59:59,540 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:59:59,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:59:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:59:59,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:59:59,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2018-10-24 11:59:59,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:59:59,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:59:59,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:59:59,661 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-10-24 12:00:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:00,425 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2018-10-24 12:00:00,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:00:00,427 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2018-10-24 12:00:00,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:00,429 INFO L225 Difference]: With dead ends: 61 [2018-10-24 12:00:00,429 INFO L226 Difference]: Without dead ends: 57 [2018-10-24 12:00:00,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=309, Invalid=813, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 12:00:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-24 12:00:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-24 12:00:00,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-24 12:00:00,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-24 12:00:00,439 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 47 [2018-10-24 12:00:00,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:00,439 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-24 12:00:00,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 12:00:00,439 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-24 12:00:00,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-24 12:00:00,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:00,441 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:00,441 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:00,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1873110959, now seen corresponding path program 6 times [2018-10-24 12:00:00,442 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:00,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:00,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:00,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:00,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:00,914 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 12:00:00,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:00,944 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-24 12:00:00,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:00,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:01,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:01,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2018-10-24 12:00:01,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 12:00:01,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 12:00:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2018-10-24 12:00:01,077 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 22 states. [2018-10-24 12:00:02,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:02,259 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2018-10-24 12:00:02,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 12:00:02,260 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2018-10-24 12:00:02,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:02,261 INFO L225 Difference]: With dead ends: 70 [2018-10-24 12:00:02,262 INFO L226 Difference]: Without dead ends: 66 [2018-10-24 12:00:02,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=423, Invalid=1137, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 12:00:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-24 12:00:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-24 12:00:02,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-24 12:00:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-24 12:00:02,272 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 56 [2018-10-24 12:00:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:02,272 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-24 12:00:02,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 12:00:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-24 12:00:02,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-24 12:00:02,274 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:02,274 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:02,274 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:02,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:02,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2028181556, now seen corresponding path program 7 times [2018-10-24 12:00:02,275 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:02,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:02,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:02,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:02,959 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:02,960 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 12:00:02,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:03,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:03,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:03,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2018-10-24 12:00:03,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 12:00:03,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 12:00:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2018-10-24 12:00:03,141 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 25 states. [2018-10-24 12:00:03,335 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 8 [2018-10-24 12:00:03,526 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 9 [2018-10-24 12:00:04,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:04,398 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-10-24 12:00:04,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 12:00:04,399 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 65 [2018-10-24 12:00:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:04,401 INFO L225 Difference]: With dead ends: 79 [2018-10-24 12:00:04,401 INFO L226 Difference]: Without dead ends: 75 [2018-10-24 12:00:04,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 12:00:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-24 12:00:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-24 12:00:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-24 12:00:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-24 12:00:04,410 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 65 [2018-10-24 12:00:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:04,411 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-24 12:00:04,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 12:00:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-24 12:00:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 12:00:04,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:04,412 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:04,413 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:04,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:04,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1530712753, now seen corresponding path program 8 times [2018-10-24 12:00:04,413 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:04,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:04,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:04,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:04,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:04,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:04,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:04,876 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 12:00:04,894 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:04,953 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:04,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:04,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:05,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:05,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2018-10-24 12:00:05,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 12:00:05,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 12:00:05,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2018-10-24 12:00:05,207 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 28 states. [2018-10-24 12:00:05,526 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 9 [2018-10-24 12:00:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:07,153 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2018-10-24 12:00:07,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 12:00:07,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 74 [2018-10-24 12:00:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:07,155 INFO L225 Difference]: With dead ends: 88 [2018-10-24 12:00:07,155 INFO L226 Difference]: Without dead ends: 84 [2018-10-24 12:00:07,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=705, Invalid=1947, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 12:00:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-24 12:00:07,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-24 12:00:07,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-24 12:00:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-24 12:00:07,165 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 74 [2018-10-24 12:00:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:07,166 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-24 12:00:07,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 12:00:07,166 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-24 12:00:07,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-24 12:00:07,167 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:07,167 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:07,167 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:07,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:07,168 INFO L82 PathProgramCache]: Analyzing trace with hash 430299500, now seen corresponding path program 9 times [2018-10-24 12:00:07,168 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:07,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:07,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:07,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:07,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:07,960 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 12:00:07,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:08,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2018-10-24 12:00:08,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:08,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:08,223 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:08,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:08,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2018-10-24 12:00:08,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 12:00:08,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 12:00:08,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=866, Unknown=0, NotChecked=0, Total=930 [2018-10-24 12:00:08,245 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 31 states. [2018-10-24 12:00:09,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:09,964 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2018-10-24 12:00:09,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 12:00:09,965 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2018-10-24 12:00:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:09,967 INFO L225 Difference]: With dead ends: 97 [2018-10-24 12:00:09,967 INFO L226 Difference]: Without dead ends: 93 [2018-10-24 12:00:09,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 12:00:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-24 12:00:09,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-24 12:00:09,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-24 12:00:09,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-24 12:00:09,977 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 83 [2018-10-24 12:00:09,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:09,977 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-24 12:00:09,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 12:00:09,978 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-24 12:00:09,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-24 12:00:09,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:09,979 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:09,979 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:09,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:09,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1414974191, now seen corresponding path program 10 times [2018-10-24 12:00:09,980 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:09,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:09,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:09,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:09,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:10,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:10,570 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:10,570 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 12:00:10,583 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:10,618 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:10,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:10,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:10,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:10,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2018-10-24 12:00:10,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 12:00:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 12:00:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1052, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 12:00:10,834 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 34 states. [2018-10-24 12:00:11,102 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 8 [2018-10-24 12:00:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:13,677 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2018-10-24 12:00:13,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 12:00:13,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 92 [2018-10-24 12:00:13,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:13,679 INFO L225 Difference]: With dead ends: 106 [2018-10-24 12:00:13,680 INFO L226 Difference]: Without dead ends: 102 [2018-10-24 12:00:13,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 12:00:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-24 12:00:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-24 12:00:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-24 12:00:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-24 12:00:13,690 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 92 [2018-10-24 12:00:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:13,691 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-24 12:00:13,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 12:00:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-24 12:00:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-24 12:00:13,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:13,693 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:13,693 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:13,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash 999432972, now seen corresponding path program 11 times [2018-10-24 12:00:13,694 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:13,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:13,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:13,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:13,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:14,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:14,552 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 12:00:14,560 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:14,628 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-24 12:00:14,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:14,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:14,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:14,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2018-10-24 12:00:14,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 12:00:14,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 12:00:14,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1256, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 12:00:14,977 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 37 states. [2018-10-24 12:00:16,257 WARN L179 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 11 [2018-10-24 12:00:18,399 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 11 [2018-10-24 12:00:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:18,735 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-10-24 12:00:18,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-24 12:00:18,735 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 101 [2018-10-24 12:00:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:18,737 INFO L225 Difference]: With dead ends: 115 [2018-10-24 12:00:18,737 INFO L226 Difference]: Without dead ends: 111 [2018-10-24 12:00:18,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1263, Invalid=3567, Unknown=0, NotChecked=0, Total=4830 [2018-10-24 12:00:18,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-24 12:00:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-24 12:00:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-24 12:00:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-24 12:00:18,746 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 101 [2018-10-24 12:00:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:18,747 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-24 12:00:18,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 12:00:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-24 12:00:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-24 12:00:18,748 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:18,748 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:18,749 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:18,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1838825615, now seen corresponding path program 12 times [2018-10-24 12:00:18,749 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:18,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:18,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:18,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:18,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:19,659 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:19,659 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 12:00:19,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:19,703 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-24 12:00:19,703 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:19,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:19,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:19,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2018-10-24 12:00:19,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 12:00:19,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 12:00:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 12:00:19,919 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 40 states. [2018-10-24 12:00:20,474 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 11 [2018-10-24 12:00:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:23,025 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-10-24 12:00:23,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 12:00:23,025 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2018-10-24 12:00:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:23,027 INFO L225 Difference]: With dead ends: 124 [2018-10-24 12:00:23,027 INFO L226 Difference]: Without dead ends: 120 [2018-10-24 12:00:23,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1485, Invalid=4215, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 12:00:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-24 12:00:23,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-10-24 12:00:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-24 12:00:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-10-24 12:00:23,036 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 110 [2018-10-24 12:00:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:23,037 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-10-24 12:00:23,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 12:00:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-10-24 12:00:23,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-10-24 12:00:23,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:23,038 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:23,039 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:23,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:23,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1524319404, now seen corresponding path program 13 times [2018-10-24 12:00:23,039 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:23,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:23,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:23,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:23,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:23,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:23,963 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 12:00:23,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:24,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:24,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:24,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:24,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2018-10-24 12:00:24,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 12:00:24,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 12:00:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 12:00:24,367 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 43 states. [2018-10-24 12:00:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:28,196 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2018-10-24 12:00:28,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 12:00:28,197 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 119 [2018-10-24 12:00:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:28,198 INFO L225 Difference]: With dead ends: 133 [2018-10-24 12:00:28,199 INFO L226 Difference]: Without dead ends: 129 [2018-10-24 12:00:28,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1725, Invalid=4917, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 12:00:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-24 12:00:28,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-24 12:00:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-24 12:00:28,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-24 12:00:28,208 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 119 [2018-10-24 12:00:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:28,209 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-24 12:00:28,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 12:00:28,209 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-24 12:00:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-24 12:00:28,210 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:28,210 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:28,210 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:28,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1162317359, now seen corresponding path program 14 times [2018-10-24 12:00:28,211 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:28,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:28,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:28,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:00:28,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:29,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:29,674 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 12:00:29,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:00:29,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:00:29,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:29,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:30,016 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:30,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 46 [2018-10-24 12:00:30,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 12:00:30,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 12:00:30,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1976, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 12:00:30,018 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 46 states. [2018-10-24 12:00:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:34,636 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2018-10-24 12:00:34,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 12:00:34,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 128 [2018-10-24 12:00:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:34,643 INFO L225 Difference]: With dead ends: 142 [2018-10-24 12:00:34,643 INFO L226 Difference]: Without dead ends: 138 [2018-10-24 12:00:34,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1983, Invalid=5673, Unknown=0, NotChecked=0, Total=7656 [2018-10-24 12:00:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-24 12:00:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-10-24 12:00:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-24 12:00:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-24 12:00:34,652 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 128 [2018-10-24 12:00:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:34,653 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-24 12:00:34,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 12:00:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-24 12:00:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-24 12:00:34,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:34,655 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:34,655 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:34,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 452673100, now seen corresponding path program 15 times [2018-10-24 12:00:34,655 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:34,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:34,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:34,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:34,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:35,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:35,974 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 12:00:35,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:00:36,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-24 12:00:36,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:36,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:36,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:36,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 49 [2018-10-24 12:00:36,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-24 12:00:36,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-24 12:00:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2252, Unknown=0, NotChecked=0, Total=2352 [2018-10-24 12:00:36,246 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 49 states. [2018-10-24 12:00:41,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:41,265 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-24 12:00:41,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-24 12:00:41,266 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 137 [2018-10-24 12:00:41,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:41,267 INFO L225 Difference]: With dead ends: 151 [2018-10-24 12:00:41,268 INFO L226 Difference]: Without dead ends: 147 [2018-10-24 12:00:41,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2259, Invalid=6483, Unknown=0, NotChecked=0, Total=8742 [2018-10-24 12:00:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-24 12:00:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-24 12:00:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-24 12:00:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-24 12:00:41,278 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 137 [2018-10-24 12:00:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:41,279 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-24 12:00:41,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-24 12:00:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-24 12:00:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-24 12:00:41,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:41,280 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:41,281 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:41,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:41,281 INFO L82 PathProgramCache]: Analyzing trace with hash -899199951, now seen corresponding path program 16 times [2018-10-24 12:00:41,281 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:41,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:41,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:41,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:41,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:43,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:43,067 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 12:00:43,074 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:00:43,131 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:00:43,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:43,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:43,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:43,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 52 [2018-10-24 12:00:43,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-24 12:00:43,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-24 12:00:43,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2546, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 12:00:43,326 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 52 states. [2018-10-24 12:00:43,698 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 9 [2018-10-24 12:00:43,831 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-24 12:00:49,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:49,174 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2018-10-24 12:00:49,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-24 12:00:49,174 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 146 [2018-10-24 12:00:49,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:49,176 INFO L225 Difference]: With dead ends: 160 [2018-10-24 12:00:49,176 INFO L226 Difference]: Without dead ends: 156 [2018-10-24 12:00:49,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2553, Invalid=7347, Unknown=0, NotChecked=0, Total=9900 [2018-10-24 12:00:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-24 12:00:49,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-24 12:00:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-24 12:00:49,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-10-24 12:00:49,184 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 146 [2018-10-24 12:00:49,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:49,185 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-10-24 12:00:49,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-24 12:00:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-10-24 12:00:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-24 12:00:49,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:49,186 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:49,186 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:49,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:49,186 INFO L82 PathProgramCache]: Analyzing trace with hash -185856020, now seen corresponding path program 17 times [2018-10-24 12:00:49,186 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:49,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:49,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:49,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:49,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:50,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:50,696 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 12:00:50,704 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:00:50,924 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-10-24 12:00:50,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:50,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:00:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3626 backedges. 0 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:51,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:00:51,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 55 [2018-10-24 12:00:51,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-24 12:00:51,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-24 12:00:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2858, Unknown=0, NotChecked=0, Total=2970 [2018-10-24 12:00:51,130 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 55 states. [2018-10-24 12:00:51,410 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 8 [2018-10-24 12:00:51,530 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 9 [2018-10-24 12:00:51,656 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:00:51,790 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:00:51,930 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:00:52,069 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-24 12:00:52,521 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 11 [2018-10-24 12:00:52,688 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2018-10-24 12:00:58,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:00:58,078 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2018-10-24 12:00:58,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-24 12:00:58,079 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 155 [2018-10-24 12:00:58,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:00:58,080 INFO L225 Difference]: With dead ends: 169 [2018-10-24 12:00:58,080 INFO L226 Difference]: Without dead ends: 165 [2018-10-24 12:00:58,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2865, Invalid=8265, Unknown=0, NotChecked=0, Total=11130 [2018-10-24 12:00:58,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-24 12:00:58,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-24 12:00:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-24 12:00:58,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-24 12:00:58,089 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 155 [2018-10-24 12:00:58,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:00:58,089 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-24 12:00:58,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-24 12:00:58,090 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-24 12:00:58,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-24 12:00:58,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:00:58,091 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:00:58,091 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:00:58,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:00:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1044885871, now seen corresponding path program 18 times [2018-10-24 12:00:58,091 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:00:58,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:00:58,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:58,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:00:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:00:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:00:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:00:59,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:00:59,864 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 12:00:59,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:00:59,931 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-10-24 12:00:59,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:00:59,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4082 backedges. 0 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:00,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:00,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 58 [2018-10-24 12:01:00,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-24 12:01:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-24 12:01:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3188, Unknown=0, NotChecked=0, Total=3306 [2018-10-24 12:01:00,137 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 58 states. [2018-10-24 12:01:00,307 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 8 [2018-10-24 12:01:00,436 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 8 [2018-10-24 12:01:00,568 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 9 [2018-10-24 12:01:00,707 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:01:00,851 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:01:00,993 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:01:01,131 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:01:01,289 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:01:01,448 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:01:01,613 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-24 12:01:02,596 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 11 [2018-10-24 12:01:08,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:08,116 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2018-10-24 12:01:08,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-24 12:01:08,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 164 [2018-10-24 12:01:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:08,118 INFO L225 Difference]: With dead ends: 178 [2018-10-24 12:01:08,119 INFO L226 Difference]: Without dead ends: 174 [2018-10-24 12:01:08,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3195, Invalid=9237, Unknown=0, NotChecked=0, Total=12432 [2018-10-24 12:01:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-24 12:01:08,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-10-24 12:01:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-10-24 12:01:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-10-24 12:01:08,127 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 164 [2018-10-24 12:01:08,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:08,128 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-10-24 12:01:08,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-24 12:01:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-10-24 12:01:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-24 12:01:08,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:08,129 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:08,129 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:08,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:08,130 INFO L82 PathProgramCache]: Analyzing trace with hash -685262452, now seen corresponding path program 19 times [2018-10-24 12:01:08,130 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:08,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:08,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:08,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:08,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:10,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:10,188 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 12:01:10,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:10,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4565 backedges. 0 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:10,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:10,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 61 [2018-10-24 12:01:10,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-24 12:01:10,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-24 12:01:10,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3536, Unknown=0, NotChecked=0, Total=3660 [2018-10-24 12:01:10,818 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 61 states. [2018-10-24 12:01:11,016 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 8 [2018-10-24 12:01:11,153 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 8 [2018-10-24 12:01:11,295 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 9 [2018-10-24 12:01:11,441 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:01:11,595 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:01:11,742 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:01:11,903 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:01:12,060 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:01:12,219 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:01:12,378 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:01:12,555 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:01:12,726 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:01:12,925 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-24 12:01:13,127 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-24 12:01:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:19,823 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-10-24 12:01:19,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-24 12:01:19,824 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 173 [2018-10-24 12:01:19,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:19,826 INFO L225 Difference]: With dead ends: 187 [2018-10-24 12:01:19,826 INFO L226 Difference]: Without dead ends: 183 [2018-10-24 12:01:19,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=3543, Invalid=10263, Unknown=0, NotChecked=0, Total=13806 [2018-10-24 12:01:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-24 12:01:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-24 12:01:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-24 12:01:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-24 12:01:19,836 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 173 [2018-10-24 12:01:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:19,837 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-24 12:01:19,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-24 12:01:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-24 12:01:19,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-24 12:01:19,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:19,838 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:19,838 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:19,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1534163185, now seen corresponding path program 20 times [2018-10-24 12:01:19,839 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:19,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:19,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:19,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:01:19,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:20,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:21,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:21,889 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 12:01:21,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:01:22,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:01:22,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:22,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5075 backedges. 0 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:22,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:22,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 64 [2018-10-24 12:01:22,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-24 12:01:22,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-24 12:01:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=3902, Unknown=0, NotChecked=0, Total=4032 [2018-10-24 12:01:22,922 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 64 states. [2018-10-24 12:01:23,150 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 8 [2018-10-24 12:01:23,318 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 8 [2018-10-24 12:01:23,488 WARN L179 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 9 [2018-10-24 12:01:23,646 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:01:23,811 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:01:23,969 WARN L179 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:01:24,139 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:01:24,316 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:01:24,488 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:01:24,661 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:01:24,853 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:01:25,046 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:01:25,232 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:01:25,415 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:01:25,613 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:01:26,011 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 11 [2018-10-24 12:01:26,216 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 11 [2018-10-24 12:01:33,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:33,086 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-10-24 12:01:33,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-24 12:01:33,088 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 182 [2018-10-24 12:01:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:33,090 INFO L225 Difference]: With dead ends: 196 [2018-10-24 12:01:33,090 INFO L226 Difference]: Without dead ends: 192 [2018-10-24 12:01:33,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=3909, Invalid=11343, Unknown=0, NotChecked=0, Total=15252 [2018-10-24 12:01:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2018-10-24 12:01:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2018-10-24 12:01:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2018-10-24 12:01:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2018-10-24 12:01:33,100 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 182 [2018-10-24 12:01:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:33,100 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2018-10-24 12:01:33,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-24 12:01:33,100 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2018-10-24 12:01:33,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2018-10-24 12:01:33,101 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:33,101 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:33,102 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:33,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:33,102 INFO L82 PathProgramCache]: Analyzing trace with hash -978830548, now seen corresponding path program 21 times [2018-10-24 12:01:33,102 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:33,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:33,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:33,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:33,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:35,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:35,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:35,585 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 12:01:35,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:01:35,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2018-10-24 12:01:35,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:35,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5612 backedges. 0 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:35,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:35,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 67 [2018-10-24 12:01:35,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-24 12:01:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-24 12:01:35,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4286, Unknown=0, NotChecked=0, Total=4422 [2018-10-24 12:01:35,952 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 67 states. [2018-10-24 12:01:36,164 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 8 [2018-10-24 12:01:36,324 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 8 [2018-10-24 12:01:36,486 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 9 [2018-10-24 12:01:36,660 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-24 12:01:36,833 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-24 12:01:37,010 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-24 12:01:37,194 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:01:37,384 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:01:37,563 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:01:37,747 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:01:37,938 WARN L179 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:01:38,140 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:01:38,353 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:01:38,585 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:01:38,793 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:01:39,194 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:01:39,402 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:01:39,615 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-24 12:01:46,191 WARN L179 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 11 [2018-10-24 12:01:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:01:49,048 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2018-10-24 12:01:49,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-24 12:01:49,048 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 191 [2018-10-24 12:01:49,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:01:49,050 INFO L225 Difference]: With dead ends: 205 [2018-10-24 12:01:49,050 INFO L226 Difference]: Without dead ends: 201 [2018-10-24 12:01:49,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=4293, Invalid=12477, Unknown=0, NotChecked=0, Total=16770 [2018-10-24 12:01:49,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-24 12:01:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-24 12:01:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-24 12:01:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-24 12:01:49,060 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 191 [2018-10-24 12:01:49,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:01:49,061 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-24 12:01:49,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-24 12:01:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-24 12:01:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-24 12:01:49,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:01:49,062 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:01:49,062 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:01:49,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:01:49,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1826147153, now seen corresponding path program 22 times [2018-10-24 12:01:49,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:01:49,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:01:49,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:49,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:01:49,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:01:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:01:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:51,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:01:51,780 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 12:01:51,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:01:52,054 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:01:52,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:01:52,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:01:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6176 backedges. 0 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:01:52,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:01:52,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-10-24 12:01:52,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-24 12:01:52,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-24 12:01:52,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4688, Unknown=0, NotChecked=0, Total=4830 [2018-10-24 12:01:52,448 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 70 states. [2018-10-24 12:01:52,684 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 8 [2018-10-24 12:01:52,857 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 8 [2018-10-24 12:01:53,036 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 9 [2018-10-24 12:01:53,218 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-24 12:01:53,408 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-24 12:01:53,593 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-24 12:01:53,791 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-24 12:01:54,025 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-24 12:01:54,222 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-24 12:01:54,418 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:01:54,629 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:01:54,841 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:01:55,053 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:01:55,272 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:01:55,490 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:01:55,700 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:01:55,914 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:01:56,130 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:01:56,349 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:01:56,570 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:01:56,798 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:02:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:05,241 INFO L93 Difference]: Finished difference Result 214 states and 216 transitions. [2018-10-24 12:02:05,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-24 12:02:05,241 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 200 [2018-10-24 12:02:05,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:05,243 INFO L225 Difference]: With dead ends: 214 [2018-10-24 12:02:05,244 INFO L226 Difference]: Without dead ends: 210 [2018-10-24 12:02:05,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=4695, Invalid=13665, Unknown=0, NotChecked=0, Total=18360 [2018-10-24 12:02:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-24 12:02:05,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2018-10-24 12:02:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-24 12:02:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 210 transitions. [2018-10-24 12:02:05,253 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 210 transitions. Word has length 200 [2018-10-24 12:02:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:05,253 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 210 transitions. [2018-10-24 12:02:05,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-24 12:02:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 210 transitions. [2018-10-24 12:02:05,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2018-10-24 12:02:05,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:05,254 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:05,255 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:05,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:05,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2045220044, now seen corresponding path program 23 times [2018-10-24 12:02:05,255 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:05,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:05,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:05,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:05,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:08,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:08,091 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 12:02:08,105 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 12:02:08,638 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2018-10-24 12:02:08,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:08,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:08,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6767 backedges. 0 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:08,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:08,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 73 [2018-10-24 12:02:08,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-24 12:02:08,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-24 12:02:08,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5108, Unknown=0, NotChecked=0, Total=5256 [2018-10-24 12:02:08,947 INFO L87 Difference]: Start difference. First operand 210 states and 210 transitions. Second operand 73 states. [2018-10-24 12:02:09,329 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 8 [2018-10-24 12:02:09,527 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 8 [2018-10-24 12:02:09,713 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 9 [2018-10-24 12:02:09,908 WARN L179 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-24 12:02:10,121 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-24 12:02:10,321 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-24 12:02:10,532 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-24 12:02:10,759 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-24 12:02:10,975 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-24 12:02:11,187 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-24 12:02:11,417 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-24 12:02:11,640 WARN L179 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-24 12:02:11,867 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:02:12,094 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:02:12,316 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:02:12,540 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:02:12,768 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:02:12,997 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:02:13,240 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:02:13,482 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:02:13,717 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:02:13,956 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:02:14,199 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:02:14,697 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-24 12:02:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:23,396 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-10-24 12:02:23,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-24 12:02:23,396 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 209 [2018-10-24 12:02:23,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:23,398 INFO L225 Difference]: With dead ends: 223 [2018-10-24 12:02:23,399 INFO L226 Difference]: Without dead ends: 219 [2018-10-24 12:02:23,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=5115, Invalid=14907, Unknown=0, NotChecked=0, Total=20022 [2018-10-24 12:02:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-24 12:02:23,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-24 12:02:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-24 12:02:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-24 12:02:23,408 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 209 [2018-10-24 12:02:23,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:23,409 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-24 12:02:23,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-24 12:02:23,409 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-24 12:02:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-24 12:02:23,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:23,410 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:23,410 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:23,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:23,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1169442225, now seen corresponding path program 24 times [2018-10-24 12:02:23,411 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:23,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:23,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:23,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:23,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:26,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:26,460 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 12:02:26,467 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 12:02:26,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2018-10-24 12:02:26,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:02:26,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7385 backedges. 0 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:26,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:26,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2018-10-24 12:02:26,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-24 12:02:26,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-24 12:02:26,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=5546, Unknown=0, NotChecked=0, Total=5700 [2018-10-24 12:02:26,891 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 76 states. [2018-10-24 12:02:27,227 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 8 [2018-10-24 12:02:27,421 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 8 [2018-10-24 12:02:27,616 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 9 [2018-10-24 12:02:27,815 WARN L179 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-24 12:02:28,035 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-24 12:02:28,258 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-24 12:02:28,491 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-24 12:02:28,726 WARN L179 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-24 12:02:28,952 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-24 12:02:29,185 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-24 12:02:29,431 WARN L179 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-24 12:02:29,679 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-24 12:02:29,918 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-24 12:02:30,167 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-24 12:02:30,432 WARN L179 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-24 12:02:30,690 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:02:30,939 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:02:31,185 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:02:31,440 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:02:31,700 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:02:31,964 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:02:32,211 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:02:32,501 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:02:32,761 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:02:33,023 WARN L179 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:02:33,293 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:02:33,556 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:02:33,819 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 11 [2018-10-24 12:02:42,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:02:42,853 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2018-10-24 12:02:42,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-24 12:02:42,853 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 218 [2018-10-24 12:02:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:02:42,855 INFO L225 Difference]: With dead ends: 232 [2018-10-24 12:02:42,855 INFO L226 Difference]: Without dead ends: 228 [2018-10-24 12:02:42,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=5553, Invalid=16203, Unknown=0, NotChecked=0, Total=21756 [2018-10-24 12:02:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-10-24 12:02:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-10-24 12:02:42,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-10-24 12:02:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-10-24 12:02:42,865 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 218 [2018-10-24 12:02:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:02:42,866 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-10-24 12:02:42,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-24 12:02:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-10-24 12:02:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-24 12:02:42,867 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:02:42,867 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:02:42,868 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:02:42,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:02:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash 48219756, now seen corresponding path program 25 times [2018-10-24 12:02:42,868 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:02:42,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:02:42,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:42,869 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:02:42,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:02:43,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:45,912 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:02:45,912 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 12:02:45,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:02:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:02:46,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:02:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8030 backedges. 0 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:02:47,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:02:47,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 79 [2018-10-24 12:02:47,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-24 12:02:47,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-24 12:02:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6002, Unknown=0, NotChecked=0, Total=6162 [2018-10-24 12:02:47,194 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 79 states. [2018-10-24 12:02:47,461 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 8 [2018-10-24 12:02:47,663 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 8 [2018-10-24 12:02:47,880 WARN L179 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 9 [2018-10-24 12:02:48,104 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-24 12:02:48,369 WARN L179 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-24 12:02:48,589 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-24 12:02:48,823 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-24 12:02:49,073 WARN L179 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-24 12:02:49,317 WARN L179 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-24 12:02:49,559 WARN L179 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-24 12:02:49,824 WARN L179 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-24 12:02:50,078 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-24 12:02:50,342 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-24 12:02:50,616 WARN L179 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-24 12:02:50,887 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-24 12:02:51,142 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-24 12:02:51,402 WARN L179 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-24 12:02:51,688 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-24 12:02:51,969 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:02:52,242 WARN L179 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:02:52,517 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:02:52,780 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:02:53,052 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:02:53,326 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:02:53,605 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:02:53,876 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:02:54,159 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:02:54,444 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:02:54,730 WARN L179 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 11 [2018-10-24 12:02:55,014 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:03:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:04,764 INFO L93 Difference]: Finished difference Result 241 states and 243 transitions. [2018-10-24 12:03:04,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-24 12:03:04,765 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 227 [2018-10-24 12:03:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:04,767 INFO L225 Difference]: With dead ends: 241 [2018-10-24 12:03:04,767 INFO L226 Difference]: Without dead ends: 237 [2018-10-24 12:03:04,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=6009, Invalid=17553, Unknown=0, NotChecked=0, Total=23562 [2018-10-24 12:03:04,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-24 12:03:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-10-24 12:03:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-24 12:03:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-10-24 12:03:04,777 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 227 [2018-10-24 12:03:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:04,778 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-10-24 12:03:04,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-24 12:03:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-10-24 12:03:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-24 12:03:04,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:04,779 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:04,780 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:04,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash 273278993, now seen corresponding path program 26 times [2018-10-24 12:03:04,780 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:04,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:04,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:04,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:03:04,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:08,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:08,302 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 12:03:08,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 12:03:09,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 12:03:09,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:09,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8702 backedges. 0 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:09,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:09,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2018-10-24 12:03:09,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-24 12:03:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-24 12:03:09,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=6476, Unknown=0, NotChecked=0, Total=6642 [2018-10-24 12:03:09,993 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 82 states. [2018-10-24 12:03:10,279 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 8 [2018-10-24 12:03:10,501 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 8 [2018-10-24 12:03:10,727 WARN L179 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 9 [2018-10-24 12:03:10,957 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-24 12:03:11,199 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-24 12:03:11,436 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-24 12:03:11,688 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-24 12:03:11,945 WARN L179 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-24 12:03:12,206 WARN L179 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-24 12:03:12,472 WARN L179 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-24 12:03:12,791 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-24 12:03:13,053 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-24 12:03:13,324 WARN L179 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-24 12:03:13,616 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-24 12:03:13,898 WARN L179 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-24 12:03:14,183 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-24 12:03:14,472 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-24 12:03:14,766 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-24 12:03:15,057 WARN L179 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-24 12:03:15,350 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-24 12:03:15,640 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-24 12:03:15,929 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:03:16,229 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:03:16,522 WARN L179 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:03:16,821 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:03:17,115 WARN L179 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:03:17,429 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:03:17,723 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:03:18,032 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:03:18,321 WARN L179 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:03:18,613 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:03:19,393 WARN L179 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:03:29,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:29,906 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2018-10-24 12:03:29,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-24 12:03:29,906 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 236 [2018-10-24 12:03:29,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:29,908 INFO L225 Difference]: With dead ends: 250 [2018-10-24 12:03:29,909 INFO L226 Difference]: Without dead ends: 246 [2018-10-24 12:03:29,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=6483, Invalid=18957, Unknown=0, NotChecked=0, Total=25440 [2018-10-24 12:03:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-24 12:03:29,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-24 12:03:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-24 12:03:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 246 transitions. [2018-10-24 12:03:29,918 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 246 transitions. Word has length 236 [2018-10-24 12:03:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:29,919 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 246 transitions. [2018-10-24 12:03:29,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-24 12:03:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 246 transitions. [2018-10-24 12:03:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2018-10-24 12:03:29,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:29,920 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:29,920 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:29,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:29,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1695207436, now seen corresponding path program 27 times [2018-10-24 12:03:29,921 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:29,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:29,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:29,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:29,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:03:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:33,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:03:33,813 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 12:03:33,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:03:33,913 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 80 check-sat command(s) [2018-10-24 12:03:33,913 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:03:33,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:03:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9401 backedges. 0 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:03:35,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 12:03:35,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 85 [2018-10-24 12:03:35,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-24 12:03:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-24 12:03:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=6968, Unknown=0, NotChecked=0, Total=7140 [2018-10-24 12:03:35,200 INFO L87 Difference]: Start difference. First operand 246 states and 246 transitions. Second operand 85 states. [2018-10-24 12:03:35,507 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 8 [2018-10-24 12:03:35,745 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 8 [2018-10-24 12:03:35,985 WARN L179 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 9 [2018-10-24 12:03:36,230 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 11 [2018-10-24 12:03:36,504 WARN L179 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 11 [2018-10-24 12:03:36,749 WARN L179 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 11 [2018-10-24 12:03:37,012 WARN L179 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 11 [2018-10-24 12:03:37,290 WARN L179 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 11 [2018-10-24 12:03:37,567 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 11 [2018-10-24 12:03:37,840 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 11 [2018-10-24 12:03:38,129 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 11 [2018-10-24 12:03:38,416 WARN L179 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 11 [2018-10-24 12:03:38,705 WARN L179 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 11 [2018-10-24 12:03:39,017 WARN L179 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 11 [2018-10-24 12:03:39,326 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 11 [2018-10-24 12:03:39,609 WARN L179 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 11 [2018-10-24 12:03:39,892 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 11 [2018-10-24 12:03:40,188 WARN L179 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 11 [2018-10-24 12:03:40,493 WARN L179 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 11 [2018-10-24 12:03:40,797 WARN L179 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 11 [2018-10-24 12:03:41,105 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 11 [2018-10-24 12:03:41,410 WARN L179 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 11 [2018-10-24 12:03:41,728 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 11 [2018-10-24 12:03:42,025 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 11 [2018-10-24 12:03:42,334 WARN L179 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 11 [2018-10-24 12:03:42,649 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 11 [2018-10-24 12:03:42,970 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 11 [2018-10-24 12:03:43,283 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 11 [2018-10-24 12:03:43,587 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 11 [2018-10-24 12:03:43,896 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 11 [2018-10-24 12:03:44,206 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 11 [2018-10-24 12:03:44,515 WARN L179 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 11 [2018-10-24 12:03:44,829 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 11 [2018-10-24 12:03:45,143 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 11 [2018-10-24 12:03:45,767 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 11 [2018-10-24 12:03:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:03:56,259 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-10-24 12:03:56,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-24 12:03:56,259 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 245 [2018-10-24 12:03:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:03:56,261 INFO L225 Difference]: With dead ends: 259 [2018-10-24 12:03:56,261 INFO L226 Difference]: Without dead ends: 255 [2018-10-24 12:03:56,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3322 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=6975, Invalid=20415, Unknown=0, NotChecked=0, Total=27390 [2018-10-24 12:03:56,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-24 12:03:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-10-24 12:03:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-24 12:03:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-10-24 12:03:56,271 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 245 [2018-10-24 12:03:56,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:03:56,272 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-10-24 12:03:56,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-24 12:03:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-10-24 12:03:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-10-24 12:03:56,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:03:56,273 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:03:56,274 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:03:56,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:03:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash 828355185, now seen corresponding path program 28 times [2018-10-24 12:03:56,274 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 12:03:56,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 12:03:56,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:56,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:03:56,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:03:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:04:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10127 backedges. 0 proven. 10127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:04:01,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:04:01,334 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 12:04:01,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... [2018-10-24 12:04:01,979 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:04:01,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:04:02,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:04:02,399 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-24 12:04:02,600 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:04:02,600 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:04:02,604 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:04:02,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:04:02 BoogieIcfgContainer [2018-10-24 12:04:02,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:04:02,605 INFO L168 Benchmark]: Toolchain (without parser) took 250343.34 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 667.4 MB). Free memory was 1.4 GB in the beginning and 1.8 GB in the end (delta: -376.8 MB). Peak memory consumption was 290.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:02,606 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:04:02,606 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:02,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:04:02,607 INFO L168 Benchmark]: Boogie Preprocessor took 25.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:04:02,607 INFO L168 Benchmark]: RCFGBuilder took 327.32 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -789.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:02,607 INFO L168 Benchmark]: TraceAbstraction took 249646.13 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -68.7 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 402.3 MB). Peak memory consumption was 333.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:04:02,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 301.59 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 327.32 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 736.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -789.6 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249646.13 ms. Allocated memory was 2.3 GB in the beginning and 2.2 GB in the end (delta: -68.7 MB). Free memory was 2.2 GB in the beginning and 1.8 GB in the end (delta: 402.3 MB). Peak memory consumption was 333.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 255 with TraceHistMax 83,while TraceCheckSpWp was constructing forward predicates,while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. TIMEOUT Result, 249.5s OverallTime, 30 OverallIterations, 83 TraceHistogramMax, 187.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 273 SDtfs, 4086 SDslu, 4852 SDs, 0 SdLazy, 6340 SolverSat, 2545 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5747 GetRequests, 3424 SyntacticMatches, 0 SemanticMatches, 2323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31773 ImplicationChecksByTransitivity, 217.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=255occurred in iteration=29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 29 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 7.7s SatisfiabilityAnalysisTime, 45.5s InterpolantComputationTime, 6927 NumberOfCodeBlocks, 6927 NumberOfCodeBlocksAsserted, 612 NumberOfCheckSat, 6871 ConstructedInterpolants, 0 QuantifiedInterpolants, 5566483 SizeOfPredicates, 54 NumberOfNonLiveVariables, 4806 ConjunctsInSsa, 1161 ConjunctsInUnsatCore, 56 InterpolantComputations, 2 PerfectInterpolantSequences, 0/174906 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown