java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 11:51:24,556 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 11:51:24,557 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 11:51:24,571 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 11:51:24,571 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 11:51:24,572 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 11:51:24,574 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 11:51:24,575 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 11:51:24,577 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 11:51:24,578 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 11:51:24,579 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 11:51:24,579 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 11:51:24,580 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 11:51:24,581 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 11:51:24,582 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 11:51:24,583 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 11:51:24,584 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 11:51:24,586 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 11:51:24,588 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 11:51:24,590 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 11:51:24,591 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 11:51:24,592 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 11:51:24,597 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 11:51:24,616 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 11:51:24,641 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 11:51:24,641 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 11:51:24,643 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 11:51:24,643 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-24 11:51:24,643 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-24 11:51:24,644 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-24 11:51:24,644 INFO L133 SettingsManager]: * Use SBE=true [2018-10-24 11:51:24,644 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 11:51:24,644 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 11:51:24,645 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 11:51:24,646 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 11:51:24,646 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 11:51:24,646 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 11:51:24,646 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 11:51:24,646 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 11:51:24,647 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 11:51:24,647 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 11:51:24,647 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 11:51:24,647 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 11:51:24,647 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 11:51:24,649 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 11:51:24,649 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 11:51:24,649 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 11:51:24,649 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-24 11:51:24,650 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 11:51:24,650 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 11:51:24,650 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 11:51:24,650 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 11:51:24,714 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 11:51:24,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 11:51:24,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 11:51:24,735 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 11:51:24,735 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 11:51:24,736 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-10-24 11:51:24,797 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aef05528d/16d57d0c580e4c38ac2f3b77b6a30723/FLAG837831e1d [2018-10-24 11:51:25,260 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 11:51:25,261 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_true-unreach-call4_true-termination.i [2018-10-24 11:51:25,266 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aef05528d/16d57d0c580e4c38ac2f3b77b6a30723/FLAG837831e1d [2018-10-24 11:51:25,281 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/aef05528d/16d57d0c580e4c38ac2f3b77b6a30723 [2018-10-24 11:51:25,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 11:51:25,292 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 11:51:25,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 11:51:25,293 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 11:51:25,297 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 11:51:25,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a25570f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25, skipping insertion in model container [2018-10-24 11:51:25,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 11:51:25,330 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 11:51:25,496 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:51:25,500 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 11:51:25,521 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 11:51:25,543 INFO L193 MainTranslator]: Completed translation [2018-10-24 11:51:25,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25 WrapperNode [2018-10-24 11:51:25,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 11:51:25,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 11:51:25,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 11:51:25,545 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 11:51:25,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 11:51:25,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 11:51:25,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 11:51:25,589 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 11:51:25,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,604 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,623 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (1/1) ... [2018-10-24 11:51:25,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 11:51:25,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 11:51:25,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 11:51:25,628 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 11:51:25,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (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 11:51:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-10-24 11:51:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 11:51:25,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 11:51:26,188 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 11:51:26,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:51:26 BoogieIcfgContainer [2018-10-24 11:51:26,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 11:51:26,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 11:51:26,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 11:51:26,193 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 11:51:26,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:51:25" (1/3) ... [2018-10-24 11:51:26,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7b7e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:51:26, skipping insertion in model container [2018-10-24 11:51:26,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:51:25" (2/3) ... [2018-10-24 11:51:26,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e7b7e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:51:26, skipping insertion in model container [2018-10-24 11:51:26,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:51:26" (3/3) ... [2018-10-24 11:51:26,197 INFO L112 eAbstractionObserver]: Analyzing ICFG array_true-unreach-call4_true-termination.i [2018-10-24 11:51:26,207 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 11:51:26,215 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 11:51:26,233 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 11:51:26,266 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-24 11:51:26,267 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 11:51:26,267 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 11:51:26,267 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 11:51:26,267 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 11:51:26,268 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 11:51:26,268 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 11:51:26,268 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 11:51:26,268 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 11:51:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-10-24 11:51:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-24 11:51:26,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:26,289 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:26,292 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:26,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:26,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1760242803, now seen corresponding path program 1 times [2018-10-24 11:51:26,300 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:26,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:26,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:26,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:26,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:26,412 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 11:51:26,414 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:51:26,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 11:51:26,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 11:51:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 11:51:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 11:51:26,436 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-10-24 11:51:26,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:26,451 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2018-10-24 11:51:26,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 11:51:26,453 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2018-10-24 11:51:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:26,463 INFO L225 Difference]: With dead ends: 33 [2018-10-24 11:51:26,464 INFO L226 Difference]: Without dead ends: 16 [2018-10-24 11:51:26,467 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 11:51:26,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-24 11:51:26,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-24 11:51:26,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-24 11:51:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-10-24 11:51:26,498 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2018-10-24 11:51:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:26,498 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-10-24 11:51:26,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 11:51:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-10-24 11:51:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-24 11:51:26,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:26,499 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:26,500 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:26,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:26,500 INFO L82 PathProgramCache]: Analyzing trace with hash 559942139, now seen corresponding path program 1 times [2018-10-24 11:51:26,500 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:26,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:26,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:26,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:26,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:26,567 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 11:51:26,567 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 11:51:26,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 11:51:26,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 11:51:26,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 11:51:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:51:26,573 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2018-10-24 11:51:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:26,665 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2018-10-24 11:51:26,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 11:51:26,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-24 11:51:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:26,669 INFO L225 Difference]: With dead ends: 37 [2018-10-24 11:51:26,670 INFO L226 Difference]: Without dead ends: 28 [2018-10-24 11:51:26,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 11:51:26,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-24 11:51:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-24 11:51:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-24 11:51:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-10-24 11:51:26,679 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2018-10-24 11:51:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:26,679 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-10-24 11:51:26,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 11:51:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-10-24 11:51:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-24 11:51:26,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:26,681 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:26,682 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:26,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:26,682 INFO L82 PathProgramCache]: Analyzing trace with hash -57758920, now seen corresponding path program 1 times [2018-10-24 11:51:26,682 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:26,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:26,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:26,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:26,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:26,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:26,764 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 11:51:26,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:26,765 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 11:51:26,777 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:26,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:26,848 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 11:51:26,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:26,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-24 11:51:26,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 11:51:26,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 11:51:26,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:51:26,872 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2018-10-24 11:51:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:27,094 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2018-10-24 11:51:27,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-24 11:51:27,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-10-24 11:51:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:27,096 INFO L225 Difference]: With dead ends: 49 [2018-10-24 11:51:27,096 INFO L226 Difference]: Without dead ends: 40 [2018-10-24 11:51:27,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-24 11:51:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-24 11:51:27,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2018-10-24 11:51:27,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-24 11:51:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-24 11:51:27,102 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2018-10-24 11:51:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:27,102 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-24 11:51:27,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 11:51:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-24 11:51:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-24 11:51:27,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:27,104 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:27,104 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:27,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 309610523, now seen corresponding path program 2 times [2018-10-24 11:51:27,104 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:27,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:27,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:27,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:27,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 11:51:27,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:27,349 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 11:51:27,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:51:27,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-24 11:51:27,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:27,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-24 11:51:27,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-24 11:51:27,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2018-10-24 11:51:27,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:51:27,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:51:27,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:51:27,537 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2018-10-24 11:51:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:27,772 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-10-24 11:51:27,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-24 11:51:27,773 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-24 11:51:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:27,774 INFO L225 Difference]: With dead ends: 55 [2018-10-24 11:51:27,774 INFO L226 Difference]: Without dead ends: 40 [2018-10-24 11:51:27,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:51:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-24 11:51:27,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2018-10-24 11:51:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-24 11:51:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-24 11:51:27,781 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 21 [2018-10-24 11:51:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:27,781 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-24 11:51:27,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:51:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-24 11:51:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-24 11:51:27,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:27,783 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:27,783 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:27,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:27,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1620776846, now seen corresponding path program 1 times [2018-10-24 11:51:27,784 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:27,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:27,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:27,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:27,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:51:27,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:27,903 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 11:51:27,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:27,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:51:28,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:28,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-24 11:51:28,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-24 11:51:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-24 11:51:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:51:28,033 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 7 states. [2018-10-24 11:51:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:28,121 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2018-10-24 11:51:28,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 11:51:28,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2018-10-24 11:51:28,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:28,124 INFO L225 Difference]: With dead ends: 69 [2018-10-24 11:51:28,125 INFO L226 Difference]: Without dead ends: 52 [2018-10-24 11:51:28,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-24 11:51:28,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-24 11:51:28,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2018-10-24 11:51:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-24 11:51:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-24 11:51:28,134 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2018-10-24 11:51:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:28,134 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-24 11:51:28,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-24 11:51:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-24 11:51:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 11:51:28,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:28,136 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:28,136 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:28,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash 813884079, now seen corresponding path program 2 times [2018-10-24 11:51:28,137 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:28,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:28,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:28,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:28,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:51:28,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:28,367 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 11:51:28,383 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:51:28,444 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:51:28,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:28,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:51:28,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:28,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-24 11:51:28,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-24 11:51:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-24 11:51:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:51:28,592 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 8 states. [2018-10-24 11:51:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:28,767 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2018-10-24 11:51:28,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-24 11:51:28,769 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2018-10-24 11:51:28,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:28,770 INFO L225 Difference]: With dead ends: 81 [2018-10-24 11:51:28,770 INFO L226 Difference]: Without dead ends: 64 [2018-10-24 11:51:28,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-24 11:51:28,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-24 11:51:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2018-10-24 11:51:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-24 11:51:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-24 11:51:28,777 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2018-10-24 11:51:28,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:28,777 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-24 11:51:28,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-24 11:51:28,777 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-24 11:51:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-24 11:51:28,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:28,779 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:28,779 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:28,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash -852965742, now seen corresponding path program 3 times [2018-10-24 11:51:28,780 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:28,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:28,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:28,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:28,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-10-24 11:51:28,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:28,921 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 11:51:28,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:51:28,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-24 11:51:28,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:29,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-24 11:51:29,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:29,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2018-10-24 11:51:29,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:51:29,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:51:29,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:51:29,088 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 10 states. [2018-10-24 11:51:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:29,605 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2018-10-24 11:51:29,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:51:29,606 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2018-10-24 11:51:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:29,608 INFO L225 Difference]: With dead ends: 87 [2018-10-24 11:51:29,608 INFO L226 Difference]: Without dead ends: 64 [2018-10-24 11:51:29,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:51:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-24 11:51:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-10-24 11:51:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-24 11:51:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2018-10-24 11:51:29,615 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 45 [2018-10-24 11:51:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:29,616 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2018-10-24 11:51:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:51:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2018-10-24 11:51:29,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-24 11:51:29,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:29,618 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:29,618 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:29,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:29,618 INFO L82 PathProgramCache]: Analyzing trace with hash -197540133, now seen corresponding path program 4 times [2018-10-24 11:51:29,619 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:29,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:29,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:29,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:29,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:29,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:29,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:29,904 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:29,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:51:29,974 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:51:29,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:29,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:30,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:30,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-24 11:51:30,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 11:51:30,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 11:51:30,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:51:30,129 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 10 states. [2018-10-24 11:51:30,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:30,528 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2018-10-24 11:51:30,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 11:51:30,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2018-10-24 11:51:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:30,529 INFO L225 Difference]: With dead ends: 102 [2018-10-24 11:51:30,529 INFO L226 Difference]: Without dead ends: 76 [2018-10-24 11:51:30,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-24 11:51:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-24 11:51:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2018-10-24 11:51:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-24 11:51:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-24 11:51:30,538 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 59 [2018-10-24 11:51:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:30,538 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-24 11:51:30,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 11:51:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-24 11:51:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-24 11:51:30,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:30,540 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:30,540 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:30,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:30,540 INFO L82 PathProgramCache]: Analyzing trace with hash -385082856, now seen corresponding path program 5 times [2018-10-24 11:51:30,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:30,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:30,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:30,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:30,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:30,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:30,751 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:30,759 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:51:30,849 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-24 11:51:30,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:30,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:30,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:30,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-24 11:51:30,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-24 11:51:30,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-24 11:51:30,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:51:30,908 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 11 states. [2018-10-24 11:51:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:31,043 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2018-10-24 11:51:31,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-24 11:51:31,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2018-10-24 11:51:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:31,045 INFO L225 Difference]: With dead ends: 114 [2018-10-24 11:51:31,045 INFO L226 Difference]: Without dead ends: 88 [2018-10-24 11:51:31,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-24 11:51:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-24 11:51:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2018-10-24 11:51:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-24 11:51:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2018-10-24 11:51:31,058 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 64 [2018-10-24 11:51:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:31,058 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2018-10-24 11:51:31,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-24 11:51:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2018-10-24 11:51:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-24 11:51:31,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:31,062 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:31,063 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:31,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:31,063 INFO L82 PathProgramCache]: Analyzing trace with hash 835536123, now seen corresponding path program 6 times [2018-10-24 11:51:31,063 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:31,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:31,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:31,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:31,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:31,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:31,331 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:31,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:51:31,419 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-24 11:51:31,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:31,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:31,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:31,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-24 11:51:31,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-24 11:51:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-24 11:51:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:51:31,475 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 12 states. [2018-10-24 11:51:31,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:31,619 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2018-10-24 11:51:31,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-24 11:51:31,620 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2018-10-24 11:51:31,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:31,621 INFO L225 Difference]: With dead ends: 126 [2018-10-24 11:51:31,621 INFO L226 Difference]: Without dead ends: 100 [2018-10-24 11:51:31,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-24 11:51:31,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-24 11:51:31,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2018-10-24 11:51:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-24 11:51:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-24 11:51:31,631 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 69 [2018-10-24 11:51:31,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:31,631 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-24 11:51:31,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-24 11:51:31,631 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-24 11:51:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-24 11:51:31,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:31,633 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:31,633 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:31,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1754427384, now seen corresponding path program 7 times [2018-10-24 11:51:31,634 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:31,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:31,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:31,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:31,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:31,962 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:31,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:32,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:32,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:32,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-24 11:51:32,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 11:51:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 11:51:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:51:32,067 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 13 states. [2018-10-24 11:51:32,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:32,214 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2018-10-24 11:51:32,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 11:51:32,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2018-10-24 11:51:32,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:32,216 INFO L225 Difference]: With dead ends: 138 [2018-10-24 11:51:32,216 INFO L226 Difference]: Without dead ends: 112 [2018-10-24 11:51:32,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-24 11:51:32,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-24 11:51:32,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2018-10-24 11:51:32,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-24 11:51:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2018-10-24 11:51:32,224 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2018-10-24 11:51:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:32,224 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2018-10-24 11:51:32,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 11:51:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2018-10-24 11:51:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-24 11:51:32,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:32,226 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:32,227 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:32,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:32,227 INFO L82 PathProgramCache]: Analyzing trace with hash 3250971, now seen corresponding path program 8 times [2018-10-24 11:51:32,227 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:32,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:32,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:32,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:32,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:32,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:32,427 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:32,439 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:51:32,488 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:51:32,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:32,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:32,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:32,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-24 11:51:32,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-24 11:51:32,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-24 11:51:32,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:51:32,561 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 14 states. [2018-10-24 11:51:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:32,800 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2018-10-24 11:51:32,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-24 11:51:32,801 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2018-10-24 11:51:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:32,802 INFO L225 Difference]: With dead ends: 150 [2018-10-24 11:51:32,802 INFO L226 Difference]: Without dead ends: 124 [2018-10-24 11:51:32,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-24 11:51:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-24 11:51:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2018-10-24 11:51:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-24 11:51:32,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-24 11:51:32,809 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 79 [2018-10-24 11:51:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:32,810 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-24 11:51:32,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-24 11:51:32,810 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-24 11:51:32,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-24 11:51:32,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:32,813 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:32,813 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:32,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash -267457064, now seen corresponding path program 9 times [2018-10-24 11:51:32,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:32,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:32,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:32,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:32,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-10-24 11:51:33,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:33,036 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) [2018-10-24 11:51:33,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:33,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-24 11:51:33,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:33,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2018-10-24 11:51:33,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:33,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 16 [2018-10-24 11:51:33,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:51:33,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:51:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:51:33,226 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 16 states. [2018-10-24 11:51:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:33,614 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2018-10-24 11:51:33,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-24 11:51:33,614 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2018-10-24 11:51:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:33,615 INFO L225 Difference]: With dead ends: 150 [2018-10-24 11:51:33,615 INFO L226 Difference]: Without dead ends: 112 [2018-10-24 11:51:33,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:51:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-24 11:51:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2018-10-24 11:51:33,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-24 11:51:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2018-10-24 11:51:33,622 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 84 [2018-10-24 11:51:33,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:33,622 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2018-10-24 11:51:33,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:51:33,622 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2018-10-24 11:51:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-24 11:51:33,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:33,624 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:33,624 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:33,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1863306171, now seen corresponding path program 10 times [2018-10-24 11:51:33,625 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:33,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:33,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:33,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:33,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:34,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:34,563 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:34,589 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:51:34,658 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:51:34,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:34,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:34,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:34,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-24 11:51:34,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 11:51:34,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 11:51:34,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:51:34,729 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 16 states. [2018-10-24 11:51:34,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:34,875 INFO L93 Difference]: Finished difference Result 168 states and 170 transitions. [2018-10-24 11:51:34,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-24 11:51:34,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 107 [2018-10-24 11:51:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:34,877 INFO L225 Difference]: With dead ends: 168 [2018-10-24 11:51:34,877 INFO L226 Difference]: Without dead ends: 124 [2018-10-24 11:51:34,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-24 11:51:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-24 11:51:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 113. [2018-10-24 11:51:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-24 11:51:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-24 11:51:34,883 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 107 [2018-10-24 11:51:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:34,883 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-24 11:51:34,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 11:51:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-24 11:51:34,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-24 11:51:34,885 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:34,885 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:34,885 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:34,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash 949604600, now seen corresponding path program 11 times [2018-10-24 11:51:34,886 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:34,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:34,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:34,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:34,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:35,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:35,196 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:35,203 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:51:35,301 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-24 11:51:35,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:35,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:35,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:35,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-24 11:51:35,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-24 11:51:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-24 11:51:35,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:51:35,354 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 17 states. [2018-10-24 11:51:35,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:35,586 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-10-24 11:51:35,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 11:51:35,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2018-10-24 11:51:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:35,588 INFO L225 Difference]: With dead ends: 180 [2018-10-24 11:51:35,588 INFO L226 Difference]: Without dead ends: 136 [2018-10-24 11:51:35,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-24 11:51:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-24 11:51:35,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2018-10-24 11:51:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-24 11:51:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2018-10-24 11:51:35,594 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 112 [2018-10-24 11:51:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:35,595 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2018-10-24 11:51:35,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-24 11:51:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2018-10-24 11:51:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-24 11:51:35,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:35,598 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:35,598 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:35,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash -979203621, now seen corresponding path program 12 times [2018-10-24 11:51:35,598 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:35,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:35,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:35,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:35,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:35,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:35,891 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:35,899 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:51:36,310 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-10-24 11:51:36,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:36,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:36,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:36,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-24 11:51:36,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-24 11:51:36,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-24 11:51:36,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:51:36,381 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 18 states. [2018-10-24 11:51:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:36,532 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2018-10-24 11:51:36,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-24 11:51:36,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 117 [2018-10-24 11:51:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:36,533 INFO L225 Difference]: With dead ends: 192 [2018-10-24 11:51:36,534 INFO L226 Difference]: Without dead ends: 148 [2018-10-24 11:51:36,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-24 11:51:36,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-10-24 11:51:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 123. [2018-10-24 11:51:36,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-24 11:51:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-24 11:51:36,538 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 117 [2018-10-24 11:51:36,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:36,539 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-24 11:51:36,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-24 11:51:36,539 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-24 11:51:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-24 11:51:36,540 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:36,541 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:36,541 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:36,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:36,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1666652456, now seen corresponding path program 13 times [2018-10-24 11:51:36,541 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:36,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:36,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:36,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:36,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:36,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:36,880 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:36,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:36,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:37,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:37,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-24 11:51:37,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-24 11:51:37,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-24 11:51:37,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:51:37,058 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 19 states. [2018-10-24 11:51:37,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:37,414 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-10-24 11:51:37,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-24 11:51:37,414 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 122 [2018-10-24 11:51:37,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:37,416 INFO L225 Difference]: With dead ends: 204 [2018-10-24 11:51:37,416 INFO L226 Difference]: Without dead ends: 160 [2018-10-24 11:51:37,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-24 11:51:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-24 11:51:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 128. [2018-10-24 11:51:37,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-24 11:51:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2018-10-24 11:51:37,421 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 122 [2018-10-24 11:51:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:37,421 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2018-10-24 11:51:37,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-24 11:51:37,421 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2018-10-24 11:51:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-24 11:51:37,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:37,422 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:37,422 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:37,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:37,423 INFO L82 PathProgramCache]: Analyzing trace with hash -420077573, now seen corresponding path program 14 times [2018-10-24 11:51:37,423 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:37,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:37,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:37,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:37,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:37,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:37,676 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:37,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:51:37,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:51:37,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:37,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:37,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:37,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-24 11:51:37,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-24 11:51:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-24 11:51:37,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:51:37,808 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 20 states. [2018-10-24 11:51:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:37,993 INFO L93 Difference]: Finished difference Result 216 states and 218 transitions. [2018-10-24 11:51:37,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 11:51:37,993 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 127 [2018-10-24 11:51:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:37,994 INFO L225 Difference]: With dead ends: 216 [2018-10-24 11:51:37,994 INFO L226 Difference]: Without dead ends: 172 [2018-10-24 11:51:37,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-24 11:51:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-24 11:51:37,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 133. [2018-10-24 11:51:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-24 11:51:37,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-24 11:51:37,999 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 127 [2018-10-24 11:51:37,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:37,999 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-24 11:51:37,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-24 11:51:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-24 11:51:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-24 11:51:38,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:38,000 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:38,001 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:38,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2067913544, now seen corresponding path program 15 times [2018-10-24 11:51:38,001 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:38,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:38,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:38,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:38,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2018-10-24 11:51:38,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:38,483 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:38,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:51:38,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2018-10-24 11:51:38,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:38,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-24 11:51:38,810 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:38,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 22 [2018-10-24 11:51:38,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:51:38,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:51:38,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:51:38,811 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 22 states. [2018-10-24 11:51:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:39,121 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2018-10-24 11:51:39,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-24 11:51:39,122 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 132 [2018-10-24 11:51:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:39,124 INFO L225 Difference]: With dead ends: 216 [2018-10-24 11:51:39,124 INFO L226 Difference]: Without dead ends: 160 [2018-10-24 11:51:39,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:51:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-24 11:51:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2018-10-24 11:51:39,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-24 11:51:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2018-10-24 11:51:39,130 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 132 [2018-10-24 11:51:39,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:39,130 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2018-10-24 11:51:39,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:51:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2018-10-24 11:51:39,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-10-24 11:51:39,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:39,132 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:39,132 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:39,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash 467671195, now seen corresponding path program 16 times [2018-10-24 11:51:39,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:39,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:39,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:39,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:39,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:39,587 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:39,598 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:51:39,777 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:51:39,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:39,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:39,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:39,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:39,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-24 11:51:39,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 11:51:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 11:51:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:51:39,928 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand 22 states. [2018-10-24 11:51:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:40,125 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2018-10-24 11:51:40,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-24 11:51:40,125 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 155 [2018-10-24 11:51:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:40,127 INFO L225 Difference]: With dead ends: 234 [2018-10-24 11:51:40,127 INFO L226 Difference]: Without dead ends: 172 [2018-10-24 11:51:40,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-24 11:51:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-10-24 11:51:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2018-10-24 11:51:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-24 11:51:40,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-24 11:51:40,131 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 155 [2018-10-24 11:51:40,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:40,132 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-24 11:51:40,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 11:51:40,132 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-24 11:51:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-24 11:51:40,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:40,133 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:40,133 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:40,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2100678616, now seen corresponding path program 17 times [2018-10-24 11:51:40,133 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:40,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:40,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:40,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:40,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:40,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:40,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:40,727 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:40,735 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:51:41,060 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-10-24 11:51:41,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:41,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:41,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:41,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-24 11:51:41,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-24 11:51:41,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-24 11:51:41,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:51:41,142 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 23 states. [2018-10-24 11:51:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:41,359 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2018-10-24 11:51:41,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-24 11:51:41,359 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2018-10-24 11:51:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:41,361 INFO L225 Difference]: With dead ends: 246 [2018-10-24 11:51:41,361 INFO L226 Difference]: Without dead ends: 184 [2018-10-24 11:51:41,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-24 11:51:41,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-24 11:51:41,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 166. [2018-10-24 11:51:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-24 11:51:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2018-10-24 11:51:41,367 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 160 [2018-10-24 11:51:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:41,367 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2018-10-24 11:51:41,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-24 11:51:41,367 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2018-10-24 11:51:41,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-10-24 11:51:41,368 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:41,368 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:41,369 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:41,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:41,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1475483323, now seen corresponding path program 18 times [2018-10-24 11:51:41,369 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:41,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:41,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:41,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:43,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:43,231 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:43,238 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:51:44,849 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-24 11:51:44,850 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:44,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:44,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:44,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:44,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-24 11:51:44,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-24 11:51:44,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-24 11:51:44,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:51:44,951 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand 24 states. [2018-10-24 11:51:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:45,330 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2018-10-24 11:51:45,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-24 11:51:45,334 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 165 [2018-10-24 11:51:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:45,335 INFO L225 Difference]: With dead ends: 258 [2018-10-24 11:51:45,336 INFO L226 Difference]: Without dead ends: 196 [2018-10-24 11:51:45,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-24 11:51:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-24 11:51:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2018-10-24 11:51:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-24 11:51:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-24 11:51:45,341 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 165 [2018-10-24 11:51:45,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:45,341 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-24 11:51:45,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-24 11:51:45,341 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-24 11:51:45,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-24 11:51:45,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:45,342 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:45,343 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:45,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:45,343 INFO L82 PathProgramCache]: Analyzing trace with hash -917658184, now seen corresponding path program 19 times [2018-10-24 11:51:45,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:45,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:45,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:45,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:45,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:45,848 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:45,848 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:45,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:45,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:45,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:45,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-24 11:51:45,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-24 11:51:45,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-24 11:51:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:51:45,986 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 25 states. [2018-10-24 11:51:46,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:46,208 INFO L93 Difference]: Finished difference Result 270 states and 272 transitions. [2018-10-24 11:51:46,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-24 11:51:46,209 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 170 [2018-10-24 11:51:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:46,211 INFO L225 Difference]: With dead ends: 270 [2018-10-24 11:51:46,211 INFO L226 Difference]: Without dead ends: 208 [2018-10-24 11:51:46,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-24 11:51:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-24 11:51:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 176. [2018-10-24 11:51:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-24 11:51:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2018-10-24 11:51:46,217 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 170 [2018-10-24 11:51:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:46,217 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2018-10-24 11:51:46,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-24 11:51:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2018-10-24 11:51:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-10-24 11:51:46,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:46,218 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:46,219 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:46,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:46,219 INFO L82 PathProgramCache]: Analyzing trace with hash -122360613, now seen corresponding path program 20 times [2018-10-24 11:51:46,219 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:46,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:46,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:46,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:51:46,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:46,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:46,614 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:46,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:51:46,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:51:46,696 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:46,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1694 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:46,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:46,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-24 11:51:46,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-24 11:51:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-24 11:51:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:51:46,784 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 26 states. [2018-10-24 11:51:47,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:47,665 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2018-10-24 11:51:47,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-24 11:51:47,665 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 175 [2018-10-24 11:51:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:47,667 INFO L225 Difference]: With dead ends: 282 [2018-10-24 11:51:47,667 INFO L226 Difference]: Without dead ends: 220 [2018-10-24 11:51:47,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-24 11:51:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-24 11:51:47,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 181. [2018-10-24 11:51:47,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-24 11:51:47,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-24 11:51:47,672 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 175 [2018-10-24 11:51:47,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:47,673 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-24 11:51:47,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-24 11:51:47,673 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-24 11:51:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-24 11:51:47,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:47,674 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:47,674 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:47,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:47,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1250188392, now seen corresponding path program 21 times [2018-10-24 11:51:47,674 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:47,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:47,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:47,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:47,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-24 11:51:48,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:48,252 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:48,259 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:51:49,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2018-10-24 11:51:49,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:49,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2018-10-24 11:51:49,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:49,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 28 [2018-10-24 11:51:49,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:51:49,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:51:49,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:51:49,698 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 28 states. [2018-10-24 11:51:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:50,802 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2018-10-24 11:51:50,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-24 11:51:50,803 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 180 [2018-10-24 11:51:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:50,804 INFO L225 Difference]: With dead ends: 282 [2018-10-24 11:51:50,805 INFO L226 Difference]: Without dead ends: 208 [2018-10-24 11:51:50,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=407, Invalid=715, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:51:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-10-24 11:51:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2018-10-24 11:51:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2018-10-24 11:51:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2018-10-24 11:51:50,810 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 180 [2018-10-24 11:51:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:50,811 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2018-10-24 11:51:50,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:51:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2018-10-24 11:51:50,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-24 11:51:50,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:50,812 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:50,812 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:50,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1093184891, now seen corresponding path program 22 times [2018-10-24 11:51:50,813 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:50,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:50,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:50,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:50,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:51:51,441 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:51,441 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:51,448 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:51:51,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:51:51,828 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:51,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:51:51,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:51,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-24 11:51:51,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-24 11:51:51,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-24 11:51:51,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:51:51,924 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 28 states. [2018-10-24 11:51:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:52,793 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2018-10-24 11:51:52,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-24 11:51:52,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 203 [2018-10-24 11:51:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:52,795 INFO L225 Difference]: With dead ends: 300 [2018-10-24 11:51:52,796 INFO L226 Difference]: Without dead ends: 220 [2018-10-24 11:51:52,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-24 11:51:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2018-10-24 11:51:52,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2018-10-24 11:51:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-24 11:51:52,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-10-24 11:51:52,801 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 203 [2018-10-24 11:51:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:52,802 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-10-24 11:51:52,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-24 11:51:52,802 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-10-24 11:51:52,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-24 11:51:52,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:52,803 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:52,803 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:52,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash 90052280, now seen corresponding path program 23 times [2018-10-24 11:51:52,804 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:52,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:52,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:52,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:52,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:51:53,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:53,790 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:53,797 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:51:54,303 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-24 11:51:54,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:51:54,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:51:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2426 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:51:54,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:51:54,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-24 11:51:54,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-24 11:51:54,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-24 11:51:54,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:51:54,437 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 29 states. [2018-10-24 11:51:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:51:55,612 INFO L93 Difference]: Finished difference Result 312 states and 314 transitions. [2018-10-24 11:51:55,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-24 11:51:55,613 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2018-10-24 11:51:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:51:55,615 INFO L225 Difference]: With dead ends: 312 [2018-10-24 11:51:55,615 INFO L226 Difference]: Without dead ends: 232 [2018-10-24 11:51:55,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-24 11:51:55,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2018-10-24 11:51:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 214. [2018-10-24 11:51:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2018-10-24 11:51:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2018-10-24 11:51:55,621 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 208 [2018-10-24 11:51:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:51:55,621 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2018-10-24 11:51:55,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-24 11:51:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2018-10-24 11:51:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-24 11:51:55,623 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:51:55,623 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:51:55,623 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:51:55,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:51:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash 792325019, now seen corresponding path program 24 times [2018-10-24 11:51:55,623 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:51:55,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:51:55,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:55,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:51:55,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:51:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:51:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:51:57,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:51:57,554 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:51:57,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:52:01,874 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-24 11:52:01,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:01,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2553 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:52:01,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:01,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-24 11:52:01,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 11:52:01,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 11:52:01,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:52:01,973 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 30 states. [2018-10-24 11:52:02,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:02,891 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2018-10-24 11:52:02,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-24 11:52:02,892 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 213 [2018-10-24 11:52:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:02,893 INFO L225 Difference]: With dead ends: 324 [2018-10-24 11:52:02,893 INFO L226 Difference]: Without dead ends: 244 [2018-10-24 11:52:02,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-24 11:52:02,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-24 11:52:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 219. [2018-10-24 11:52:02,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-24 11:52:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-24 11:52:02,899 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 213 [2018-10-24 11:52:02,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:02,899 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-24 11:52:02,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 11:52:02,899 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-24 11:52:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-24 11:52:02,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:02,901 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:02,901 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:02,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1023323288, now seen corresponding path program 25 times [2018-10-24 11:52:02,902 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:02,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:02,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:02,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:02,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:52:03,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:03,944 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:03,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:04,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2685 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:52:04,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:04,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-24 11:52:04,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-24 11:52:04,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-24 11:52:04,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:52:04,113 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 31 states. [2018-10-24 11:52:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:04,399 INFO L93 Difference]: Finished difference Result 336 states and 338 transitions. [2018-10-24 11:52:04,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-24 11:52:04,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 218 [2018-10-24 11:52:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:04,402 INFO L225 Difference]: With dead ends: 336 [2018-10-24 11:52:04,402 INFO L226 Difference]: Without dead ends: 256 [2018-10-24 11:52:04,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-24 11:52:04,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-24 11:52:04,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 224. [2018-10-24 11:52:04,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2018-10-24 11:52:04,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2018-10-24 11:52:04,408 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 218 [2018-10-24 11:52:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:04,408 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2018-10-24 11:52:04,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-24 11:52:04,408 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2018-10-24 11:52:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-24 11:52:04,409 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:04,410 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:04,410 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:04,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash 2079064507, now seen corresponding path program 26 times [2018-10-24 11:52:04,410 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:04,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:04,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:04,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:04,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:52:05,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:05,223 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:05,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:52:05,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:52:05,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:05,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2822 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:52:05,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:05,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-24 11:52:05,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-24 11:52:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-24 11:52:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:52:05,401 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 32 states. [2018-10-24 11:52:05,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:05,675 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2018-10-24 11:52:05,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-24 11:52:05,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 223 [2018-10-24 11:52:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:05,677 INFO L225 Difference]: With dead ends: 348 [2018-10-24 11:52:05,677 INFO L226 Difference]: Without dead ends: 268 [2018-10-24 11:52:05,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-24 11:52:05,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-10-24 11:52:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 229. [2018-10-24 11:52:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-24 11:52:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-10-24 11:52:05,683 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 223 [2018-10-24 11:52:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:05,684 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-10-24 11:52:05,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-24 11:52:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-10-24 11:52:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-24 11:52:05,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:05,685 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:05,685 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:05,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:05,686 INFO L82 PathProgramCache]: Analyzing trace with hash -792368520, now seen corresponding path program 27 times [2018-10-24 11:52:05,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:05,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:05,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:05,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:05,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2018-10-24 11:52:06,270 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:06,271 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:06,278 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:52:09,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-24 11:52:09,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:09,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2018-10-24 11:52:09,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:09,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 34 [2018-10-24 11:52:09,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:52:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:52:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:52:09,552 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 34 states. [2018-10-24 11:52:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:09,943 INFO L93 Difference]: Finished difference Result 348 states and 356 transitions. [2018-10-24 11:52:09,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 11:52:09,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 228 [2018-10-24 11:52:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:09,946 INFO L225 Difference]: With dead ends: 348 [2018-10-24 11:52:09,946 INFO L226 Difference]: Without dead ends: 256 [2018-10-24 11:52:09,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=584, Invalid=976, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:52:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-24 11:52:09,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2018-10-24 11:52:09,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2018-10-24 11:52:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2018-10-24 11:52:09,951 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 228 [2018-10-24 11:52:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:09,951 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2018-10-24 11:52:09,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:52:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2018-10-24 11:52:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2018-10-24 11:52:09,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:09,953 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:09,953 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:09,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1041790373, now seen corresponding path program 28 times [2018-10-24 11:52:09,954 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:09,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:09,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:09,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:09,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:52:11,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:11,179 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:11,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:52:11,713 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:52:11,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:11,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:52:11,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:11,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-24 11:52:11,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-24 11:52:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-24 11:52:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:52:11,790 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 34 states. [2018-10-24 11:52:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:12,088 INFO L93 Difference]: Finished difference Result 366 states and 368 transitions. [2018-10-24 11:52:12,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-24 11:52:12,089 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 251 [2018-10-24 11:52:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:12,091 INFO L225 Difference]: With dead ends: 366 [2018-10-24 11:52:12,091 INFO L226 Difference]: Without dead ends: 268 [2018-10-24 11:52:12,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-24 11:52:12,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-10-24 11:52:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 257. [2018-10-24 11:52:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-24 11:52:12,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-10-24 11:52:12,097 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 251 [2018-10-24 11:52:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:12,098 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-10-24 11:52:12,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-24 11:52:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-10-24 11:52:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-24 11:52:12,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:12,099 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:12,099 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:12,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:12,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1139759720, now seen corresponding path program 29 times [2018-10-24 11:52:12,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:12,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:12,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:12,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:12,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3752 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:52:12,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:12,639 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:12,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:52:13,837 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2018-10-24 11:52:13,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:13,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3752 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:52:13,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:13,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-24 11:52:13,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 11:52:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 11:52:13,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:52:13,994 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 35 states. [2018-10-24 11:52:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:14,327 INFO L93 Difference]: Finished difference Result 378 states and 380 transitions. [2018-10-24 11:52:14,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-24 11:52:14,328 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 256 [2018-10-24 11:52:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:14,330 INFO L225 Difference]: With dead ends: 378 [2018-10-24 11:52:14,330 INFO L226 Difference]: Without dead ends: 280 [2018-10-24 11:52:14,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-24 11:52:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-10-24 11:52:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 262. [2018-10-24 11:52:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2018-10-24 11:52:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2018-10-24 11:52:14,335 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 256 [2018-10-24 11:52:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:14,336 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2018-10-24 11:52:14,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-24 11:52:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2018-10-24 11:52:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2018-10-24 11:52:14,337 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:14,337 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:14,337 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:14,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:14,338 INFO L82 PathProgramCache]: Analyzing trace with hash 779618427, now seen corresponding path program 30 times [2018-10-24 11:52:14,338 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:14,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:14,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:14,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:14,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:14,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3909 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2018-10-24 11:52:14,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:14,958 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:14,965 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:52:35,366 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2018-10-24 11:52:35,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:35,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3909 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2018-10-24 11:52:35,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:35,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 37 [2018-10-24 11:52:35,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:52:35,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:52:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:52:35,549 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand 37 states. [2018-10-24 11:52:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:36,002 INFO L93 Difference]: Finished difference Result 384 states and 389 transitions. [2018-10-24 11:52:36,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-24 11:52:36,002 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 261 [2018-10-24 11:52:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:36,004 INFO L225 Difference]: With dead ends: 384 [2018-10-24 11:52:36,004 INFO L226 Difference]: Without dead ends: 280 [2018-10-24 11:52:36,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=650, Invalid=910, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:52:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-10-24 11:52:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2018-10-24 11:52:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2018-10-24 11:52:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 277 transitions. [2018-10-24 11:52:36,009 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 277 transitions. Word has length 261 [2018-10-24 11:52:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:36,010 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 277 transitions. [2018-10-24 11:52:36,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:52:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 277 transitions. [2018-10-24 11:52:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2018-10-24 11:52:36,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:36,011 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:36,011 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:36,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:36,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1575822830, now seen corresponding path program 31 times [2018-10-24 11:52:36,012 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:36,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:36,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:36,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:36,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-24 11:52:36,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:36,628 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:36,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:36,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-24 11:52:36,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:36,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-24 11:52:36,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-24 11:52:36,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-24 11:52:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:52:36,918 INFO L87 Difference]: Start difference. First operand 276 states and 277 transitions. Second operand 37 states. [2018-10-24 11:52:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:37,331 INFO L93 Difference]: Finished difference Result 399 states and 401 transitions. [2018-10-24 11:52:37,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-24 11:52:37,331 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 275 [2018-10-24 11:52:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:37,333 INFO L225 Difference]: With dead ends: 399 [2018-10-24 11:52:37,333 INFO L226 Difference]: Without dead ends: 292 [2018-10-24 11:52:37,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-24 11:52:37,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-24 11:52:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 281. [2018-10-24 11:52:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-24 11:52:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2018-10-24 11:52:37,339 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 275 [2018-10-24 11:52:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:37,339 INFO L481 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2018-10-24 11:52:37,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-24 11:52:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2018-10-24 11:52:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-24 11:52:37,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:37,341 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:37,341 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:37,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:37,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1998762417, now seen corresponding path program 32 times [2018-10-24 11:52:37,341 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:37,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:37,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:37,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:52:37,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-24 11:52:38,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:38,173 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:38,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:52:38,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:52:38,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:38,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-24 11:52:38,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:38,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-24 11:52:38,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-24 11:52:38,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-24 11:52:38,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:52:38,470 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand 38 states. [2018-10-24 11:52:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:39,344 INFO L93 Difference]: Finished difference Result 411 states and 413 transitions. [2018-10-24 11:52:39,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-24 11:52:39,345 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 280 [2018-10-24 11:52:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:39,346 INFO L225 Difference]: With dead ends: 411 [2018-10-24 11:52:39,346 INFO L226 Difference]: Without dead ends: 304 [2018-10-24 11:52:39,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-24 11:52:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-10-24 11:52:39,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2018-10-24 11:52:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2018-10-24 11:52:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2018-10-24 11:52:39,352 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 280 [2018-10-24 11:52:39,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:39,352 INFO L481 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2018-10-24 11:52:39,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-24 11:52:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2018-10-24 11:52:39,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2018-10-24 11:52:39,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:39,355 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:39,355 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:39,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:39,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1433208782, now seen corresponding path program 33 times [2018-10-24 11:52:39,355 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:39,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:39,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:39,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:39,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4695 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-24 11:52:40,439 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:40,439 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:40,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:52:54,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-24 11:52:54,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:54,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4695 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2018-10-24 11:52:54,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:54,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 40 [2018-10-24 11:52:54,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:52:54,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:52:54,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:52:54,694 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 40 states. [2018-10-24 11:52:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:55,110 INFO L93 Difference]: Finished difference Result 417 states and 422 transitions. [2018-10-24 11:52:55,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:52:55,111 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 285 [2018-10-24 11:52:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:55,113 INFO L225 Difference]: With dead ends: 417 [2018-10-24 11:52:55,113 INFO L226 Difference]: Without dead ends: 304 [2018-10-24 11:52:55,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1045, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:52:55,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2018-10-24 11:52:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2018-10-24 11:52:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-10-24 11:52:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 301 transitions. [2018-10-24 11:52:55,119 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 301 transitions. Word has length 285 [2018-10-24 11:52:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:55,119 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 301 transitions. [2018-10-24 11:52:55,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:52:55,119 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 301 transitions. [2018-10-24 11:52:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2018-10-24 11:52:55,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:55,121 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:55,121 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:55,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -40194245, now seen corresponding path program 34 times [2018-10-24 11:52:55,122 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:55,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:55,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:55,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:55,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:55,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:55,842 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:52:55,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:52:56,895 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:52:56,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:52:56,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:52:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:57,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:52:57,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-24 11:52:57,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-24 11:52:57,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-24 11:52:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:52:57,005 INFO L87 Difference]: Start difference. First operand 300 states and 301 transitions. Second operand 40 states. [2018-10-24 11:52:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:52:57,392 INFO L93 Difference]: Finished difference Result 432 states and 434 transitions. [2018-10-24 11:52:57,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-24 11:52:57,392 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 299 [2018-10-24 11:52:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:52:57,394 INFO L225 Difference]: With dead ends: 432 [2018-10-24 11:52:57,394 INFO L226 Difference]: Without dead ends: 316 [2018-10-24 11:52:57,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 299 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-24 11:52:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2018-10-24 11:52:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 305. [2018-10-24 11:52:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-24 11:52:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-10-24 11:52:57,400 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 299 [2018-10-24 11:52:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:52:57,400 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-10-24 11:52:57,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-24 11:52:57,400 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-10-24 11:52:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-24 11:52:57,402 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:52:57,402 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:52:57,402 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:52:57,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:52:57,403 INFO L82 PathProgramCache]: Analyzing trace with hash 147553400, now seen corresponding path program 35 times [2018-10-24 11:52:57,403 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:52:57,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:52:57,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:57,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:52:57,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:52:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:52:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5366 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:52:59,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:52:59,414 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-24 11:52:59,423 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:01,154 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-24 11:53:01,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:53:01,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:53:01,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5366 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:53:01,324 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:53:01,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-24 11:53:01,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-24 11:53:01,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-24 11:53:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:53:01,326 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 41 states. [2018-10-24 11:53:02,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:53:02,396 INFO L93 Difference]: Finished difference Result 444 states and 446 transitions. [2018-10-24 11:53:02,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-24 11:53:02,396 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 304 [2018-10-24 11:53:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:53:02,399 INFO L225 Difference]: With dead ends: 444 [2018-10-24 11:53:02,400 INFO L226 Difference]: Without dead ends: 328 [2018-10-24 11:53:02,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-24 11:53:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-10-24 11:53:02,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 310. [2018-10-24 11:53:02,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 310 states. [2018-10-24 11:53:02,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 311 transitions. [2018-10-24 11:53:02,406 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 311 transitions. Word has length 304 [2018-10-24 11:53:02,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:53:02,406 INFO L481 AbstractCegarLoop]: Abstraction has 310 states and 311 transitions. [2018-10-24 11:53:02,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-24 11:53:02,406 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 311 transitions. [2018-10-24 11:53:02,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2018-10-24 11:53:02,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:53:02,409 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:53:02,409 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:53:02,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:53:02,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1255510693, now seen corresponding path program 36 times [2018-10-24 11:53:02,409 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:53:02,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:53:02,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:02,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:53:02,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:53:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:53:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5553 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:53:03,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:53:03,259 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:53:03,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-24 11:54:04,761 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2018-10-24 11:54:04,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:04,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5553 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:54:04,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:04,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-24 11:54:04,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-24 11:54:04,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-24 11:54:04,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:54:04,911 INFO L87 Difference]: Start difference. First operand 310 states and 311 transitions. Second operand 42 states. [2018-10-24 11:54:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:05,421 INFO L93 Difference]: Finished difference Result 456 states and 458 transitions. [2018-10-24 11:54:05,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-24 11:54:05,421 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 309 [2018-10-24 11:54:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:05,422 INFO L225 Difference]: With dead ends: 456 [2018-10-24 11:54:05,422 INFO L226 Difference]: Without dead ends: 340 [2018-10-24 11:54:05,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-24 11:54:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2018-10-24 11:54:05,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 315. [2018-10-24 11:54:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-24 11:54:05,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-10-24 11:54:05,427 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 309 [2018-10-24 11:54:05,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:05,427 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-10-24 11:54:05,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-24 11:54:05,428 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-10-24 11:54:05,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-24 11:54:05,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:05,429 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:05,430 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:05,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:05,430 INFO L82 PathProgramCache]: Analyzing trace with hash 570266200, now seen corresponding path program 37 times [2018-10-24 11:54:05,430 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:05,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:05,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:05,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:05,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5745 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:54:06,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:06,222 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:06,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:06,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5745 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:54:06,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:06,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-24 11:54:06,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-24 11:54:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-24 11:54:06,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:54:06,445 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 43 states. [2018-10-24 11:54:06,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:06,851 INFO L93 Difference]: Finished difference Result 468 states and 470 transitions. [2018-10-24 11:54:06,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-24 11:54:06,852 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 314 [2018-10-24 11:54:06,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:06,854 INFO L225 Difference]: With dead ends: 468 [2018-10-24 11:54:06,854 INFO L226 Difference]: Without dead ends: 352 [2018-10-24 11:54:06,855 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 11:54:06,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-10-24 11:54:06,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 320. [2018-10-24 11:54:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2018-10-24 11:54:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 321 transitions. [2018-10-24 11:54:06,859 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 321 transitions. Word has length 314 [2018-10-24 11:54:06,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:06,859 INFO L481 AbstractCegarLoop]: Abstraction has 320 states and 321 transitions. [2018-10-24 11:54:06,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-24 11:54:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 321 transitions. [2018-10-24 11:54:06,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2018-10-24 11:54:06,861 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:06,862 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:06,862 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:06,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:06,862 INFO L82 PathProgramCache]: Analyzing trace with hash -549780613, now seen corresponding path program 38 times [2018-10-24 11:54:06,862 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:06,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:06,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:06,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 11:54:06,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:54:08,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:08,877 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:08,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-24 11:54:09,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-24 11:54:09,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:09,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:54:09,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:09,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-24 11:54:09,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-24 11:54:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-24 11:54:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:54:09,257 INFO L87 Difference]: Start difference. First operand 320 states and 321 transitions. Second operand 44 states. [2018-10-24 11:54:10,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:10,641 INFO L93 Difference]: Finished difference Result 480 states and 482 transitions. [2018-10-24 11:54:10,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-24 11:54:10,641 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 319 [2018-10-24 11:54:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:10,642 INFO L225 Difference]: With dead ends: 480 [2018-10-24 11:54:10,642 INFO L226 Difference]: Without dead ends: 364 [2018-10-24 11:54:10,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-24 11:54:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-10-24 11:54:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 325. [2018-10-24 11:54:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-10-24 11:54:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2018-10-24 11:54:10,648 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 319 [2018-10-24 11:54:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:10,649 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2018-10-24 11:54:10,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-24 11:54:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2018-10-24 11:54:10,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-24 11:54:10,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:10,651 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:10,651 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:10,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:10,651 INFO L82 PathProgramCache]: Analyzing trace with hash -277491656, now seen corresponding path program 39 times [2018-10-24 11:54:10,651 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:10,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:10,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:10,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:10,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6144 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2018-10-24 11:54:11,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:11,763 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:11,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 11:54:36,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2018-10-24 11:54:36,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:36,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6144 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2018-10-24 11:54:36,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:36,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 40] total 46 [2018-10-24 11:54:36,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 11:54:36,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 11:54:36,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:54:36,330 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 46 states. [2018-10-24 11:54:36,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:36,875 INFO L93 Difference]: Finished difference Result 480 states and 488 transitions. [2018-10-24 11:54:36,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-24 11:54:36,875 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 324 [2018-10-24 11:54:36,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:36,877 INFO L225 Difference]: With dead ends: 480 [2018-10-24 11:54:36,877 INFO L226 Difference]: Without dead ends: 352 [2018-10-24 11:54:36,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1046, Invalid=1606, Unknown=0, NotChecked=0, Total=2652 [2018-10-24 11:54:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2018-10-24 11:54:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2018-10-24 11:54:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-10-24 11:54:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 349 transitions. [2018-10-24 11:54:36,882 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 349 transitions. Word has length 324 [2018-10-24 11:54:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:36,883 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 349 transitions. [2018-10-24 11:54:36,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 11:54:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 349 transitions. [2018-10-24 11:54:36,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-10-24 11:54:36,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:36,884 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:36,884 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:36,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:36,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1337975781, now seen corresponding path program 40 times [2018-10-24 11:54:36,885 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:36,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:36,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:36,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:54:37,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:37,754 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:37,761 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 11:54:38,697 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 11:54:38,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:38,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:38,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:54:38,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:38,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-24 11:54:38,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-24 11:54:38,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-24 11:54:38,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:54:38,814 INFO L87 Difference]: Start difference. First operand 348 states and 349 transitions. Second operand 46 states. [2018-10-24 11:54:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:39,247 INFO L93 Difference]: Finished difference Result 498 states and 500 transitions. [2018-10-24 11:54:39,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-24 11:54:39,247 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 347 [2018-10-24 11:54:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:39,249 INFO L225 Difference]: With dead ends: 498 [2018-10-24 11:54:39,249 INFO L226 Difference]: Without dead ends: 364 [2018-10-24 11:54:39,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-24 11:54:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2018-10-24 11:54:39,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 353. [2018-10-24 11:54:39,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-10-24 11:54:39,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 354 transitions. [2018-10-24 11:54:39,255 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 354 transitions. Word has length 347 [2018-10-24 11:54:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:39,256 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 354 transitions. [2018-10-24 11:54:39,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-24 11:54:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 354 transitions. [2018-10-24 11:54:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-10-24 11:54:39,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:39,258 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:39,258 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:39,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:39,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1349739688, now seen corresponding path program 41 times [2018-10-24 11:54:39,259 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:39,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:39,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:39,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:39,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7268 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:54:40,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:40,212 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:40,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-24 11:54:43,020 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 44 check-sat command(s) [2018-10-24 11:54:43,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 11:54:43,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 11:54:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7268 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:54:43,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-24 11:54:43,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-24 11:54:43,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-24 11:54:43,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-24 11:54:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:54:43,142 INFO L87 Difference]: Start difference. First operand 353 states and 354 transitions. Second operand 47 states. [2018-10-24 11:54:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 11:54:43,713 INFO L93 Difference]: Finished difference Result 510 states and 512 transitions. [2018-10-24 11:54:43,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-24 11:54:43,713 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 352 [2018-10-24 11:54:43,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 11:54:43,715 INFO L225 Difference]: With dead ends: 510 [2018-10-24 11:54:43,715 INFO L226 Difference]: Without dead ends: 376 [2018-10-24 11:54:43,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-24 11:54:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2018-10-24 11:54:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 358. [2018-10-24 11:54:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-10-24 11:54:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2018-10-24 11:54:43,720 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 352 [2018-10-24 11:54:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 11:54:43,720 INFO L481 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2018-10-24 11:54:43,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-24 11:54:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2018-10-24 11:54:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-10-24 11:54:43,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 11:54:43,722 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 11:54:43,722 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 11:54:43,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 11:54:43,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2135890491, now seen corresponding path program 42 times [2018-10-24 11:54:43,722 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-24 11:54:43,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-24 11:54:43,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:43,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 11:54:43,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 11:54:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 11:54:44,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7485 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2018-10-24 11:54:44,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 11:54:44,790 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 11:54:44,800 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown