java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:40:28,237 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:40:28,240 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:40:28,256 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:40:28,257 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:40:28,258 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:40:28,259 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:40:28,261 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:40:28,264 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:40:28,264 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:40:28,267 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:40:28,268 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:40:28,269 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:40:28,271 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:40:28,280 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:40:28,281 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:40:28,283 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:40:28,285 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:40:28,288 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:40:28,291 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:40:28,294 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:40:28,296 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:40:28,299 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:40:28,312 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 [2018-10-22 15:40:28,340 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:40:28,341 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:40:28,342 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:40:28,343 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:40:28,343 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:40:28,343 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:40:28,344 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:40:28,345 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:40:28,345 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:40:28,345 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:40:28,345 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:40:28,346 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:40:28,346 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:40:28,346 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:40:28,346 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:40:28,346 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:40:28,347 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:40:28,347 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:40:28,347 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:40:28,347 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:28,348 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:40:28,348 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:40:28,348 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:40:28,348 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:40:28,349 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:40:28,349 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:40:28,349 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:40:28,349 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:40:28,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:40:28,424 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:40:28,429 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:40:28,431 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:40:28,432 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:40:28,433 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-10-22 15:40:28,518 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4121c534b/1186a40cbc24440fb34b109a14924dfa/FLAGa0a5cb856 [2018-10-22 15:40:28,978 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:40:28,979 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call1_true-termination.i [2018-10-22 15:40:28,985 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4121c534b/1186a40cbc24440fb34b109a14924dfa/FLAGa0a5cb856 [2018-10-22 15:40:29,003 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/4121c534b/1186a40cbc24440fb34b109a14924dfa [2018-10-22 15:40:29,013 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:40:29,014 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:40:29,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:29,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:40:29,019 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:40:29,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d88e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29, skipping insertion in model container [2018-10-22 15:40:29,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:40:29,063 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:40:29,279 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:29,284 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:40:29,305 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:40:29,329 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:40:29,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29 WrapperNode [2018-10-22 15:40:29,330 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:40:29,331 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:29,331 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:40:29,331 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:40:29,342 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:40:29,377 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:40:29,377 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:40:29,377 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:40:29,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... [2018-10-22 15:40:29,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:40:29,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:40:29,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:40:29,404 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:40:29,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:40:29,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:40:29,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:40:29,876 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:40:29,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:29 BoogieIcfgContainer [2018-10-22 15:40:29,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:40:29,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:40:29,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:40:29,881 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:40:29,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:40:29" (1/3) ... [2018-10-22 15:40:29,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c3634d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:29, skipping insertion in model container [2018-10-22 15:40:29,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:40:29" (2/3) ... [2018-10-22 15:40:29,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30c3634d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:40:29, skipping insertion in model container [2018-10-22 15:40:29,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:40:29" (3/3) ... [2018-10-22 15:40:29,885 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call1_true-termination.i [2018-10-22 15:40:29,897 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:40:29,906 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:40:29,940 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:40:30,009 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:40:30,010 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:40:30,010 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:40:30,010 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:40:30,010 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:40:30,011 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:40:30,011 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:40:30,011 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:40:30,011 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:40:30,037 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-10-22 15:40:30,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-22 15:40:30,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:30,045 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-22 15:40:30,048 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:30,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:30,068 INFO L82 PathProgramCache]: Analyzing trace with hash 889814567, now seen corresponding path program 1 times [2018-10-22 15:40:30,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:30,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:30,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:30,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:30,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:30,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:40:30,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:40:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:40:30,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:30,217 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-10-22 15:40:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:30,237 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2018-10-22 15:40:30,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:40:30,240 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-10-22 15:40:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:30,259 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:40:30,259 INFO L226 Difference]: Without dead ends: 9 [2018-10-22 15:40:30,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:40:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-22 15:40:30,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-22 15:40:30,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-22 15:40:30,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-22 15:40:30,292 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-22 15:40:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:30,293 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-22 15:40:30,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:40:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-22 15:40:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:40:30,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:30,294 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:30,294 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:30,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:30,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1805894861, now seen corresponding path program 1 times [2018-10-22 15:40:30,295 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:30,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:30,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,297 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:30,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:30,357 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:40:30,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:40:30,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:40:30,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:40:30,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:40:30,361 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2018-10-22 15:40:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:30,387 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-22 15:40:30,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:40:30,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-22 15:40:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:30,388 INFO L225 Difference]: With dead ends: 16 [2018-10-22 15:40:30,388 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:40:30,389 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 [2018-10-22 15:40:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:40:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2018-10-22 15:40:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-22 15:40:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-22 15:40:30,394 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2018-10-22 15:40:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:30,394 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-22 15:40:30,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:40:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-22 15:40:30,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:40:30,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:30,395 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:30,395 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:30,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:30,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1994321781, now seen corresponding path program 1 times [2018-10-22 15:40:30,396 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:30,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:30,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:30,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:30,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:30,489 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 [2018-10-22 15:40:30,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:30,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:30,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:30,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-22 15:40:30,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-22 15:40:30,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-22 15:40:30,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:30,635 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2018-10-22 15:40:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:30,712 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 15:40:30,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:40:30,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2018-10-22 15:40:30,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:30,714 INFO L225 Difference]: With dead ends: 19 [2018-10-22 15:40:30,715 INFO L226 Difference]: Without dead ends: 15 [2018-10-22 15:40:30,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:40:30,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-22 15:40:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2018-10-22 15:40:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 15:40:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 15:40:30,721 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 10 [2018-10-22 15:40:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:30,721 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 15:40:30,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-22 15:40:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 15:40:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 15:40:30,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:30,723 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:30,724 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:30,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1089618957, now seen corresponding path program 2 times [2018-10-22 15:40:30,725 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:30,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:30,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:30,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:30,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:30,809 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 [2018-10-22 15:40:30,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:30,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:30,867 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:30,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:31,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-22 15:40:31,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 15:40:31,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 15:40:31,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:31,004 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-22 15:40:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:31,091 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 15:40:31,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:40:31,092 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-22 15:40:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:31,093 INFO L225 Difference]: With dead ends: 22 [2018-10-22 15:40:31,093 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 15:40:31,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-22 15:40:31,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 15:40:31,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-10-22 15:40:31,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:40:31,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-22 15:40:31,097 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2018-10-22 15:40:31,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:31,098 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-22 15:40:31,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 15:40:31,098 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-22 15:40:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-22 15:40:31,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:31,099 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:31,099 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:31,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1122715979, now seen corresponding path program 3 times [2018-10-22 15:40:31,100 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:31,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:31,102 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:31,242 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 [2018-10-22 15:40:31,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:31,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 15:40:31,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:31,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:31,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-22 15:40:31,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:40:31,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:40:31,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:31,458 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2018-10-22 15:40:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:31,524 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 15:40:31,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:40:31,524 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-10-22 15:40:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:31,525 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:40:31,525 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:40:31,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:40:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:40:31,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-10-22 15:40:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:40:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 15:40:31,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 16 [2018-10-22 15:40:31,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:31,531 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 15:40:31,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:40:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 15:40:31,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 15:40:31,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:31,532 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:31,532 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:31,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash -726379699, now seen corresponding path program 4 times [2018-10-22 15:40:31,533 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:31,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:31,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:31,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:31,677 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:40:31,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:31,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:31,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:31,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:31,819 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:31,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:31,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-22 15:40:31,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 15:40:31,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 15:40:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:31,848 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 8 states. [2018-10-22 15:40:31,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:31,903 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-22 15:40:31,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:40:31,905 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2018-10-22 15:40:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:31,906 INFO L225 Difference]: With dead ends: 28 [2018-10-22 15:40:31,906 INFO L226 Difference]: Without dead ends: 24 [2018-10-22 15:40:31,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-22 15:40:31,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-22 15:40:31,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-10-22 15:40:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-22 15:40:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-22 15:40:31,911 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 19 [2018-10-22 15:40:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:31,911 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-22 15:40:31,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 15:40:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-22 15:40:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-22 15:40:31,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:31,913 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:31,913 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:31,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:31,914 INFO L82 PathProgramCache]: Analyzing trace with hash 114815499, now seen corresponding path program 5 times [2018-10-22 15:40:31,914 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:31,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:31,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:31,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:31,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:32,065 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-10-22 15:40:32,081 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:32,160 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-22 15:40:32,160 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:32,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:32,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-22 15:40:32,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:40:32,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:40:32,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:32,294 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2018-10-22 15:40:32,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:32,546 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-22 15:40:32,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:40:32,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2018-10-22 15:40:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:32,550 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:40:32,550 INFO L226 Difference]: Without dead ends: 27 [2018-10-22 15:40:32,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:40:32,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-22 15:40:32,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2018-10-22 15:40:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:40:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-22 15:40:32,560 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2018-10-22 15:40:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:32,561 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-22 15:40:32,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:40:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-22 15:40:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:40:32,562 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:32,563 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:32,563 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:32,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:32,563 INFO L82 PathProgramCache]: Analyzing trace with hash -973213043, now seen corresponding path program 6 times [2018-10-22 15:40:32,564 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:32,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:32,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:32,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:32,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:32,835 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 [2018-10-22 15:40:32,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:32,890 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-22 15:40:32,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:32,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:32,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:32,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-22 15:40:32,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 15:40:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 15:40:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:32,938 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 10 states. [2018-10-22 15:40:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:33,000 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-22 15:40:33,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:40:33,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2018-10-22 15:40:33,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:33,006 INFO L225 Difference]: With dead ends: 34 [2018-10-22 15:40:33,006 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:40:33,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-22 15:40:33,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:40:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2018-10-22 15:40:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-22 15:40:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-22 15:40:33,011 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2018-10-22 15:40:33,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:33,012 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-22 15:40:33,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 15:40:33,012 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-22 15:40:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-22 15:40:33,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:33,013 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:33,013 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:33,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:33,014 INFO L82 PathProgramCache]: Analyzing trace with hash -313324853, now seen corresponding path program 7 times [2018-10-22 15:40:33,014 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:33,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:33,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:33,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:33,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:33,224 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 [2018-10-22 15:40:33,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:33,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:33,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:33,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-22 15:40:33,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:40:33,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:40:33,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:33,322 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 11 states. [2018-10-22 15:40:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:33,401 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-22 15:40:33,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-22 15:40:33,403 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2018-10-22 15:40:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:33,405 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:40:33,405 INFO L226 Difference]: Without dead ends: 33 [2018-10-22 15:40:33,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:40:33,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-22 15:40:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2018-10-22 15:40:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-22 15:40:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-22 15:40:33,412 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2018-10-22 15:40:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:33,412 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-22 15:40:33,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:40:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-22 15:40:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-22 15:40:33,413 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:33,414 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:33,414 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:33,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:33,414 INFO L82 PathProgramCache]: Analyzing trace with hash 350429645, now seen corresponding path program 8 times [2018-10-22 15:40:33,415 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:33,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:33,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:33,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:33,993 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:33,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:33,994 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 [2018-10-22 15:40:34,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:34,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:34,064 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:34,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:34,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-22 15:40:34,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:40:34,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:40:34,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:34,118 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 12 states. [2018-10-22 15:40:34,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:34,343 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-22 15:40:34,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:40:34,344 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2018-10-22 15:40:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:34,345 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:40:34,345 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:40:34,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:40:34,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:40:34,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2018-10-22 15:40:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-22 15:40:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-22 15:40:34,350 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2018-10-22 15:40:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:34,351 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-22 15:40:34,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:40:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-22 15:40:34,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-22 15:40:34,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:34,352 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:34,353 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:34,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:34,353 INFO L82 PathProgramCache]: Analyzing trace with hash 231248779, now seen corresponding path program 9 times [2018-10-22 15:40:34,353 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:34,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:34,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:34,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:34,665 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 [2018-10-22 15:40:34,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:34,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-22 15:40:34,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:34,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:34,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:34,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-22 15:40:34,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:40:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:40:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:34,785 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 13 states. [2018-10-22 15:40:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:34,873 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-22 15:40:34,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-22 15:40:34,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2018-10-22 15:40:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:34,880 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:40:34,880 INFO L226 Difference]: Without dead ends: 39 [2018-10-22 15:40:34,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-22 15:40:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-22 15:40:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2018-10-22 15:40:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-22 15:40:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-22 15:40:34,887 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 34 [2018-10-22 15:40:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:34,888 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-22 15:40:34,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:40:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-22 15:40:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-22 15:40:34,889 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:34,889 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:34,890 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:34,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:34,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1652023565, now seen corresponding path program 10 times [2018-10-22 15:40:34,890 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:34,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:34,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:34,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:35,308 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:35,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:35,309 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 [2018-10-22 15:40:35,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:35,352 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:35,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:35,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:35,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:35,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-22 15:40:35,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-22 15:40:35,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-22 15:40:35,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:40:35,412 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-10-22 15:40:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:35,486 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-22 15:40:35,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:40:35,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2018-10-22 15:40:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:35,488 INFO L225 Difference]: With dead ends: 46 [2018-10-22 15:40:35,488 INFO L226 Difference]: Without dead ends: 42 [2018-10-22 15:40:35,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:40:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-22 15:40:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-22 15:40:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-22 15:40:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-22 15:40:35,492 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 37 [2018-10-22 15:40:35,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:35,493 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-22 15:40:35,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-22 15:40:35,493 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-22 15:40:35,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:40:35,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:35,494 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:35,495 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:35,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:35,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1050971211, now seen corresponding path program 11 times [2018-10-22 15:40:35,495 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:35,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:35,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:35,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:35,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:35,885 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:35,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:35,976 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-22 15:40:35,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:35,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:36,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-22 15:40:36,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:40:36,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:40:36,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:40:36,032 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 15 states. [2018-10-22 15:40:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:36,131 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-22 15:40:36,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-22 15:40:36,132 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-22 15:40:36,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:36,133 INFO L225 Difference]: With dead ends: 49 [2018-10-22 15:40:36,134 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:40:36,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-22 15:40:36,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:40:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-22 15:40:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:40:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-22 15:40:36,139 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 40 [2018-10-22 15:40:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:36,139 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-22 15:40:36,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:40:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-22 15:40:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-22 15:40:36,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,140 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,141 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,141 INFO L82 PathProgramCache]: Analyzing trace with hash 818950221, now seen corresponding path program 12 times [2018-10-22 15:40:36,141 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:36,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:36,379 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 [2018-10-22 15:40:36,389 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:36,502 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-22 15:40:36,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:36,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:36,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-22 15:40:36,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-22 15:40:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-22 15:40:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:40:36,592 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 16 states. [2018-10-22 15:40:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:36,682 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-22 15:40:36,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-22 15:40:36,682 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2018-10-22 15:40:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:36,683 INFO L225 Difference]: With dead ends: 52 [2018-10-22 15:40:36,683 INFO L226 Difference]: Without dead ends: 48 [2018-10-22 15:40:36,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-22 15:40:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-22 15:40:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2018-10-22 15:40:36,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-22 15:40:36,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-22 15:40:36,691 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 43 [2018-10-22 15:40:36,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:36,691 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-22 15:40:36,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-22 15:40:36,691 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-22 15:40:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-22 15:40:36,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:36,692 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:36,693 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:36,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -715983605, now seen corresponding path program 13 times [2018-10-22 15:40:36,693 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:36,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:36,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:36,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:36,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:36,958 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:40:36,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:37,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:37,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-22 15:40:37,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-22 15:40:37,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-22 15:40:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:40:37,070 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2018-10-22 15:40:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:37,146 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-22 15:40:37,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:40:37,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2018-10-22 15:40:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:37,148 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:40:37,148 INFO L226 Difference]: Without dead ends: 51 [2018-10-22 15:40:37,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-22 15:40:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-22 15:40:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2018-10-22 15:40:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-22 15:40:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-22 15:40:37,155 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 46 [2018-10-22 15:40:37,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:37,156 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-22 15:40:37,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-22 15:40:37,156 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-22 15:40:37,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-22 15:40:37,157 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:37,157 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:37,157 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:37,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:37,158 INFO L82 PathProgramCache]: Analyzing trace with hash 587206541, now seen corresponding path program 14 times [2018-10-22 15:40:37,158 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:37,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:37,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:37,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:37,560 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:37,560 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 [2018-10-22 15:40:37,567 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:37,631 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:37,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:37,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:37,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:37,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-22 15:40:37,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-22 15:40:37,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-22 15:40:37,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:40:37,728 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 18 states. [2018-10-22 15:40:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:37,843 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-22 15:40:37,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-22 15:40:37,849 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2018-10-22 15:40:37,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:37,850 INFO L225 Difference]: With dead ends: 58 [2018-10-22 15:40:37,850 INFO L226 Difference]: Without dead ends: 54 [2018-10-22 15:40:37,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-22 15:40:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-22 15:40:37,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2018-10-22 15:40:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-22 15:40:37,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-22 15:40:37,860 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 49 [2018-10-22 15:40:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:37,862 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-22 15:40:37,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-22 15:40:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-22 15:40:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-22 15:40:37,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:37,863 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:37,864 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:37,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:37,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1715457483, now seen corresponding path program 15 times [2018-10-22 15:40:37,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:37,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:37,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:37,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:37,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:38,290 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:38,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:38,291 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 [2018-10-22 15:40:38,324 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:38,701 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-22 15:40:38,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:38,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:38,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:38,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-22 15:40:38,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-22 15:40:38,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-22 15:40:38,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:40:38,779 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 19 states. [2018-10-22 15:40:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:38,865 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-22 15:40:38,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-22 15:40:38,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2018-10-22 15:40:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:38,867 INFO L225 Difference]: With dead ends: 61 [2018-10-22 15:40:38,867 INFO L226 Difference]: Without dead ends: 57 [2018-10-22 15:40:38,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-22 15:40:38,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-22 15:40:38,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2018-10-22 15:40:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-22 15:40:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-22 15:40:38,874 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 52 [2018-10-22 15:40:38,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:38,874 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-22 15:40:38,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-22 15:40:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-22 15:40:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-22 15:40:38,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:38,875 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:38,876 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:38,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1025212109, now seen corresponding path program 16 times [2018-10-22 15:40:38,876 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:38,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:38,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:38,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:39,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:39,319 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 [2018-10-22 15:40:39,328 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:39,386 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:39,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:39,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:39,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:39,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-22 15:40:39,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-22 15:40:39,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-22 15:40:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:40:39,441 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 20 states. [2018-10-22 15:40:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:39,547 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-22 15:40:39,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-22 15:40:39,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2018-10-22 15:40:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:39,548 INFO L225 Difference]: With dead ends: 64 [2018-10-22 15:40:39,548 INFO L226 Difference]: Without dead ends: 60 [2018-10-22 15:40:39,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-22 15:40:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-22 15:40:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2018-10-22 15:40:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-22 15:40:39,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-22 15:40:39,554 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 55 [2018-10-22 15:40:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:39,555 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-22 15:40:39,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-22 15:40:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-22 15:40:39,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-22 15:40:39,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:39,556 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:39,556 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:39,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2066278773, now seen corresponding path program 17 times [2018-10-22 15:40:39,557 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:39,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:39,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:39,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:39,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:39,874 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 [2018-10-22 15:40:39,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:40,071 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-22 15:40:40,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:40,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:40,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:40,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-22 15:40:40,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:40:40,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:40:40,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:40:40,119 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 21 states. [2018-10-22 15:40:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:40,315 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-22 15:40:40,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-22 15:40:40,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2018-10-22 15:40:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:40,317 INFO L225 Difference]: With dead ends: 67 [2018-10-22 15:40:40,317 INFO L226 Difference]: Without dead ends: 63 [2018-10-22 15:40:40,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-22 15:40:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-22 15:40:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2018-10-22 15:40:40,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-22 15:40:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-22 15:40:40,323 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 58 [2018-10-22 15:40:40,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:40,323 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-22 15:40:40,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:40:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-22 15:40:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-22 15:40:40,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:40,324 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:40,324 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:40,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash 607550989, now seen corresponding path program 18 times [2018-10-22 15:40:40,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:40,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:40,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:40,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:40,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:40,675 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 [2018-10-22 15:40:40,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:41,109 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-22 15:40:41,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:41,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:41,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:41,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-22 15:40:41,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-22 15:40:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-22 15:40:41,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:41,163 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2018-10-22 15:40:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:41,271 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-22 15:40:41,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-22 15:40:41,272 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2018-10-22 15:40:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:41,273 INFO L225 Difference]: With dead ends: 70 [2018-10-22 15:40:41,273 INFO L226 Difference]: Without dead ends: 66 [2018-10-22 15:40:41,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:40:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-22 15:40:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-22 15:40:41,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-22 15:40:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-22 15:40:41,278 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 61 [2018-10-22 15:40:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:41,278 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-22 15:40:41,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-22 15:40:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-22 15:40:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-22 15:40:41,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:41,279 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:41,279 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:41,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:41,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2088448181, now seen corresponding path program 19 times [2018-10-22 15:40:41,280 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:41,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:41,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:41,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:42,298 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:42,298 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 [2018-10-22 15:40:42,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:42,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:42,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:42,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-22 15:40:42,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-22 15:40:42,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-22 15:40:42,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:40:42,443 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 23 states. [2018-10-22 15:40:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:42,666 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-22 15:40:42,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-22 15:40:42,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2018-10-22 15:40:42,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:42,668 INFO L225 Difference]: With dead ends: 73 [2018-10-22 15:40:42,668 INFO L226 Difference]: Without dead ends: 69 [2018-10-22 15:40:42,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-22 15:40:42,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-22 15:40:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2018-10-22 15:40:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-22 15:40:42,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-22 15:40:42,673 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 64 [2018-10-22 15:40:42,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:42,673 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-22 15:40:42,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-22 15:40:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-22 15:40:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-22 15:40:42,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:42,674 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:42,674 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:42,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1583680845, now seen corresponding path program 20 times [2018-10-22 15:40:42,675 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:42,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:42,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:42,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:43,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:43,134 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 [2018-10-22 15:40:43,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:43,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:43,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:43,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:43,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:43,261 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-22 15:40:43,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-22 15:40:43,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-22 15:40:43,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:40:43,262 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 24 states. [2018-10-22 15:40:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:43,370 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-22 15:40:43,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-22 15:40:43,373 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2018-10-22 15:40:43,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:43,374 INFO L225 Difference]: With dead ends: 76 [2018-10-22 15:40:43,375 INFO L226 Difference]: Without dead ends: 72 [2018-10-22 15:40:43,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-22 15:40:43,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-22 15:40:43,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2018-10-22 15:40:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-22 15:40:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-22 15:40:43,378 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 67 [2018-10-22 15:40:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:43,379 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-22 15:40:43,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-22 15:40:43,379 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-22 15:40:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-22 15:40:43,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:43,380 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:43,380 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:43,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash 867497995, now seen corresponding path program 21 times [2018-10-22 15:40:43,381 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:43,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:43,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:43,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:43,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:43,885 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 [2018-10-22 15:40:43,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:44,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-22 15:40:44,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:44,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:44,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:44,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-22 15:40:44,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-22 15:40:44,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-22 15:40:44,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:40:44,810 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 25 states. [2018-10-22 15:40:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:44,930 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-22 15:40:44,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-22 15:40:44,930 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2018-10-22 15:40:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:44,931 INFO L225 Difference]: With dead ends: 79 [2018-10-22 15:40:44,931 INFO L226 Difference]: Without dead ends: 75 [2018-10-22 15:40:44,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-22 15:40:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-22 15:40:44,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2018-10-22 15:40:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-22 15:40:44,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-22 15:40:44,937 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 70 [2018-10-22 15:40:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:44,938 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-22 15:40:44,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-22 15:40:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-22 15:40:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-22 15:40:44,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:44,940 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:44,940 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:44,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1833227123, now seen corresponding path program 22 times [2018-10-22 15:40:44,940 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:44,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:44,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:45,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:45,561 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 [2018-10-22 15:40:45,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:45,647 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:45,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:45,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:45,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:45,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-22 15:40:45,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-22 15:40:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-22 15:40:45,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:40:45,800 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 26 states. [2018-10-22 15:40:46,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:46,103 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-22 15:40:46,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-22 15:40:46,103 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2018-10-22 15:40:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:46,105 INFO L225 Difference]: With dead ends: 82 [2018-10-22 15:40:46,105 INFO L226 Difference]: Without dead ends: 78 [2018-10-22 15:40:46,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-22 15:40:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-22 15:40:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2018-10-22 15:40:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-22 15:40:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-22 15:40:46,109 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 73 [2018-10-22 15:40:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:46,110 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-22 15:40:46,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-22 15:40:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-22 15:40:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-22 15:40:46,110 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:46,110 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:46,111 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:46,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:46,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1512861493, now seen corresponding path program 23 times [2018-10-22 15:40:46,111 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:46,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:46,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:46,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:46,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:46,647 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 [2018-10-22 15:40:46,657 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:47,276 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-22 15:40:47,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:47,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:47,316 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:47,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:47,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-22 15:40:47,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-22 15:40:47,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-22 15:40:47,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:40:47,343 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 27 states. [2018-10-22 15:40:47,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:47,457 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-22 15:40:47,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-22 15:40:47,457 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2018-10-22 15:40:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:47,458 INFO L225 Difference]: With dead ends: 85 [2018-10-22 15:40:47,458 INFO L226 Difference]: Without dead ends: 81 [2018-10-22 15:40:47,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-22 15:40:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-22 15:40:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2018-10-22 15:40:47,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-22 15:40:47,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-22 15:40:47,462 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 76 [2018-10-22 15:40:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:47,462 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-22 15:40:47,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-22 15:40:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-22 15:40:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-22 15:40:47,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:47,463 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:47,463 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:47,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:47,463 INFO L82 PathProgramCache]: Analyzing trace with hash -917709875, now seen corresponding path program 24 times [2018-10-22 15:40:47,464 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:47,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:47,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:47,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:47,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:48,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:48,854 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 [2018-10-22 15:40:48,861 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:40:49,767 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-22 15:40:49,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:49,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:49,809 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:49,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:49,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-22 15:40:49,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-22 15:40:49,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-22 15:40:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:40:49,839 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 28 states. [2018-10-22 15:40:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:49,973 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-22 15:40:49,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-22 15:40:49,973 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2018-10-22 15:40:49,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:49,974 INFO L225 Difference]: With dead ends: 88 [2018-10-22 15:40:49,975 INFO L226 Difference]: Without dead ends: 84 [2018-10-22 15:40:49,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-22 15:40:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-22 15:40:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2018-10-22 15:40:49,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-22 15:40:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-22 15:40:49,979 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 79 [2018-10-22 15:40:49,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:49,979 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-22 15:40:49,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-22 15:40:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-22 15:40:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-22 15:40:49,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:49,980 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:49,980 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:49,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash -380855925, now seen corresponding path program 25 times [2018-10-22 15:40:49,981 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:49,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:49,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:49,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:49,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:50,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:50,992 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 [2018-10-22 15:40:50,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:51,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:51,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:51,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-22 15:40:51,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:40:51,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:40:51,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:40:51,107 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 29 states. [2018-10-22 15:40:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:51,234 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-22 15:40:51,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-22 15:40:51,235 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2018-10-22 15:40:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:51,236 INFO L225 Difference]: With dead ends: 91 [2018-10-22 15:40:51,236 INFO L226 Difference]: Without dead ends: 87 [2018-10-22 15:40:51,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:40:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-22 15:40:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2018-10-22 15:40:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-22 15:40:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-22 15:40:51,240 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 82 [2018-10-22 15:40:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:51,240 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-22 15:40:51,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:40:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-22 15:40:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-22 15:40:51,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:51,241 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:51,242 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:51,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1423041779, now seen corresponding path program 26 times [2018-10-22 15:40:51,242 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:51,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:51,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:51,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:40:51,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:52,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:52,196 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:40:52,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:40:52,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:40:52,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:52,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:52,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:52,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-22 15:40:52,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-22 15:40:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-22 15:40:52,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:40:52,331 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 30 states. [2018-10-22 15:40:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:52,482 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-22 15:40:52,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-22 15:40:52,484 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2018-10-22 15:40:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:52,484 INFO L225 Difference]: With dead ends: 94 [2018-10-22 15:40:52,484 INFO L226 Difference]: Without dead ends: 90 [2018-10-22 15:40:52,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-22 15:40:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-22 15:40:52,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-22 15:40:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-22 15:40:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-22 15:40:52,487 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 85 [2018-10-22 15:40:52,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:52,488 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-22 15:40:52,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-22 15:40:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-22 15:40:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-22 15:40:52,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:52,489 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:52,489 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:52,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:52,489 INFO L82 PathProgramCache]: Analyzing trace with hash -863235509, now seen corresponding path program 27 times [2018-10-22 15:40:52,489 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:52,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:52,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:52,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:52,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:52,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:52,947 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 [2018-10-22 15:40:52,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:40:55,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-22 15:40:55,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:55,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:55,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:55,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-22 15:40:55,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-22 15:40:55,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-22 15:40:55,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:40:55,623 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 31 states. [2018-10-22 15:40:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:55,719 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-22 15:40:55,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-22 15:40:55,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2018-10-22 15:40:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:55,720 INFO L225 Difference]: With dead ends: 97 [2018-10-22 15:40:55,720 INFO L226 Difference]: Without dead ends: 93 [2018-10-22 15:40:55,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-22 15:40:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-22 15:40:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2018-10-22 15:40:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-22 15:40:55,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-22 15:40:55,724 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 88 [2018-10-22 15:40:55,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:55,725 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-22 15:40:55,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-22 15:40:55,725 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-22 15:40:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-22 15:40:55,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:55,726 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:55,726 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:55,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:55,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1032656307, now seen corresponding path program 28 times [2018-10-22 15:40:55,726 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:55,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:55,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:55,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:55,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:55,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:56,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:56,218 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 [2018-10-22 15:40:56,226 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:40:56,295 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:40:56,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:56,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:56,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:56,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-22 15:40:56,379 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-22 15:40:56,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-22 15:40:56,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:40:56,380 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 32 states. [2018-10-22 15:40:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:56,507 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-22 15:40:56,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-22 15:40:56,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2018-10-22 15:40:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:56,509 INFO L225 Difference]: With dead ends: 100 [2018-10-22 15:40:56,509 INFO L226 Difference]: Without dead ends: 96 [2018-10-22 15:40:56,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:40:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-22 15:40:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2018-10-22 15:40:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-22 15:40:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-22 15:40:56,514 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 91 [2018-10-22 15:40:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:56,514 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-22 15:40:56,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-22 15:40:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-22 15:40:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-22 15:40:56,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:56,515 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:56,515 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:56,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:56,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1661076725, now seen corresponding path program 29 times [2018-10-22 15:40:56,516 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:56,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:56,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:56,517 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:56,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:57,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:57,168 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 [2018-10-22 15:40:57,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:40:58,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-22 15:40:58,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:40:58,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:40:58,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:58,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:40:58,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-22 15:40:58,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-22 15:40:58,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-22 15:40:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:40:58,096 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 33 states. [2018-10-22 15:40:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:40:58,318 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-22 15:40:58,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-22 15:40:58,318 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2018-10-22 15:40:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:40:58,319 INFO L225 Difference]: With dead ends: 103 [2018-10-22 15:40:58,319 INFO L226 Difference]: Without dead ends: 99 [2018-10-22 15:40:58,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-22 15:40:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-22 15:40:58,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2018-10-22 15:40:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-22 15:40:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-22 15:40:58,323 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 94 [2018-10-22 15:40:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:40:58,323 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-22 15:40:58,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-22 15:40:58,323 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-22 15:40:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-22 15:40:58,324 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:40:58,324 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1] [2018-10-22 15:40:58,324 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:40:58,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:40:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1171306099, now seen corresponding path program 30 times [2018-10-22 15:40:58,325 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:40:58,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:40:58,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:58,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:40:58,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:40:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:40:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:40:59,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:40:59,014 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 [2018-10-22 15:40:59,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:06,746 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-22 15:41:06,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:06,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:06,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:06,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-22 15:41:06,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-22 15:41:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-22 15:41:06,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:06,820 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 34 states. [2018-10-22 15:41:06,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:06,989 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-22 15:41:06,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-22 15:41:06,989 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2018-10-22 15:41:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:06,991 INFO L225 Difference]: With dead ends: 106 [2018-10-22 15:41:06,991 INFO L226 Difference]: Without dead ends: 102 [2018-10-22 15:41:06,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-22 15:41:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-22 15:41:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2018-10-22 15:41:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-22 15:41:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-22 15:41:06,995 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 97 [2018-10-22 15:41:06,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:06,996 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-22 15:41:06,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-22 15:41:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-22 15:41:06,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-22 15:41:06,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:06,996 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:06,997 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:06,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:06,997 INFO L82 PathProgramCache]: Analyzing trace with hash -418491445, now seen corresponding path program 31 times [2018-10-22 15:41:06,997 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:06,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:06,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:06,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:06,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:07,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:07,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:07,575 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 [2018-10-22 15:41:07,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:07,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:07,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:07,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:07,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-22 15:41:07,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-22 15:41:07,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-22 15:41:07,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:41:07,699 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 35 states. [2018-10-22 15:41:07,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:07,865 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-22 15:41:07,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-22 15:41:07,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2018-10-22 15:41:07,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:07,866 INFO L225 Difference]: With dead ends: 109 [2018-10-22 15:41:07,866 INFO L226 Difference]: Without dead ends: 105 [2018-10-22 15:41:07,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-22 15:41:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-22 15:41:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2018-10-22 15:41:07,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-22 15:41:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-22 15:41:07,871 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 100 [2018-10-22 15:41:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:07,871 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-22 15:41:07,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-22 15:41:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-22 15:41:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-22 15:41:07,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:07,872 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:07,872 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:07,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:07,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1636353843, now seen corresponding path program 32 times [2018-10-22 15:41:07,872 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:07,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:07,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:07,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:07,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:09,722 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:09,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-22 15:41:09,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:09,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:09,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:09,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:09,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:09,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:09,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-22 15:41:09,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-22 15:41:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-22 15:41:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:41:09,865 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 36 states. [2018-10-22 15:41:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:09,985 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-22 15:41:09,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-22 15:41:09,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2018-10-22 15:41:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:09,986 INFO L225 Difference]: With dead ends: 112 [2018-10-22 15:41:09,986 INFO L226 Difference]: Without dead ends: 108 [2018-10-22 15:41:09,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-22 15:41:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-22 15:41:09,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2018-10-22 15:41:09,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-22 15:41:09,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-22 15:41:09,991 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 103 [2018-10-22 15:41:09,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:09,991 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-22 15:41:09,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-22 15:41:09,991 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-22 15:41:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-22 15:41:09,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:09,992 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:09,992 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:09,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:09,992 INFO L82 PathProgramCache]: Analyzing trace with hash 908663947, now seen corresponding path program 33 times [2018-10-22 15:41:09,992 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:09,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:09,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:09,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:09,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:11,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:11,177 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 [2018-10-22 15:41:11,185 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:16,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-22 15:41:16,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:16,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:16,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:16,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:16,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-22 15:41:16,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-22 15:41:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-22 15:41:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:41:16,798 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 37 states. [2018-10-22 15:41:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:16,933 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-22 15:41:16,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-22 15:41:16,933 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2018-10-22 15:41:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:16,934 INFO L225 Difference]: With dead ends: 115 [2018-10-22 15:41:16,935 INFO L226 Difference]: Without dead ends: 111 [2018-10-22 15:41:16,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-22 15:41:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-22 15:41:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2018-10-22 15:41:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-22 15:41:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-22 15:41:16,939 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 106 [2018-10-22 15:41:16,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:16,939 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-22 15:41:16,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-22 15:41:16,940 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-22 15:41:16,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-22 15:41:16,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:16,940 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:16,941 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:16,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash 475969549, now seen corresponding path program 34 times [2018-10-22 15:41:16,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:16,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:16,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:16,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:16,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:21,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:21,558 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 [2018-10-22 15:41:21,564 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:41:21,649 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:41:21,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:21,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:21,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:21,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-22 15:41:21,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-22 15:41:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-22 15:41:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:41:21,711 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 38 states. [2018-10-22 15:41:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:21,855 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-22 15:41:21,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-22 15:41:21,856 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2018-10-22 15:41:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:21,857 INFO L225 Difference]: With dead ends: 118 [2018-10-22 15:41:21,857 INFO L226 Difference]: Without dead ends: 114 [2018-10-22 15:41:21,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-22 15:41:21,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-22 15:41:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-22 15:41:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-22 15:41:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-22 15:41:21,861 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 109 [2018-10-22 15:41:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:21,862 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-22 15:41:21,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-22 15:41:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-22 15:41:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-22 15:41:21,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:21,863 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:21,863 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:21,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:21,863 INFO L82 PathProgramCache]: Analyzing trace with hash -725985973, now seen corresponding path program 35 times [2018-10-22 15:41:21,863 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:21,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:21,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:21,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:22,629 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:22,629 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 [2018-10-22 15:41:22,637 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:41:28,749 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-22 15:41:28,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:28,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:28,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:28,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:28,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-22 15:41:28,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-22 15:41:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-22 15:41:28,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:41:28,812 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 39 states. [2018-10-22 15:41:28,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:28,946 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-22 15:41:28,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-22 15:41:28,946 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2018-10-22 15:41:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:28,948 INFO L225 Difference]: With dead ends: 121 [2018-10-22 15:41:28,948 INFO L226 Difference]: Without dead ends: 117 [2018-10-22 15:41:28,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-22 15:41:28,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-22 15:41:28,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2018-10-22 15:41:28,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-22 15:41:28,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-22 15:41:28,952 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 112 [2018-10-22 15:41:28,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:28,953 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-22 15:41:28,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-22 15:41:28,953 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-22 15:41:28,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-22 15:41:28,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:28,954 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:28,954 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:28,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:28,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1040595123, now seen corresponding path program 36 times [2018-10-22 15:41:28,954 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:28,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:28,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:28,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:28,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:29,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:29,650 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:29,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:41:40,954 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-22 15:41:40,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:40,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:41,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:41,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-22 15:41:41,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-22 15:41:41,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-22 15:41:41,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:41:41,035 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 40 states. [2018-10-22 15:41:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:41,514 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-10-22 15:41:41,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-22 15:41:41,515 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2018-10-22 15:41:41,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:41,516 INFO L225 Difference]: With dead ends: 124 [2018-10-22 15:41:41,516 INFO L226 Difference]: Without dead ends: 120 [2018-10-22 15:41:41,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-22 15:41:41,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-10-22 15:41:41,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2018-10-22 15:41:41,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-22 15:41:41,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-22 15:41:41,521 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 115 [2018-10-22 15:41:41,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:41,521 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-22 15:41:41,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-22 15:41:41,522 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-22 15:41:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-22 15:41:41,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:41,522 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:41,523 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:41,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:41,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1943142901, now seen corresponding path program 37 times [2018-10-22 15:41:41,523 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:41,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:41,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:41,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:43,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:43,243 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:41:43,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:43,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:43,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:43,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-22 15:41:43,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-22 15:41:43,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-22 15:41:43,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:41:43,493 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 41 states. [2018-10-22 15:41:43,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:43,670 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-22 15:41:43,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-22 15:41:43,670 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2018-10-22 15:41:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:43,672 INFO L225 Difference]: With dead ends: 127 [2018-10-22 15:41:43,672 INFO L226 Difference]: Without dead ends: 123 [2018-10-22 15:41:43,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-22 15:41:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-22 15:41:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2018-10-22 15:41:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-22 15:41:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-10-22 15:41:43,677 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 118 [2018-10-22 15:41:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:43,678 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-10-22 15:41:43,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-22 15:41:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-10-22 15:41:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-22 15:41:43,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:43,679 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:43,679 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:43,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:43,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1046242957, now seen corresponding path program 38 times [2018-10-22 15:41:43,679 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:43,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:43,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:43,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:41:43,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:44,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:44,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:44,932 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 [2018-10-22 15:41:44,941 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:41:45,030 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:41:45,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:45,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:45,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:45,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-22 15:41:45,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-22 15:41:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-22 15:41:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:41:45,177 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 42 states. [2018-10-22 15:41:46,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:46,130 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-10-22 15:41:46,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-22 15:41:46,133 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2018-10-22 15:41:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:46,134 INFO L225 Difference]: With dead ends: 130 [2018-10-22 15:41:46,134 INFO L226 Difference]: Without dead ends: 126 [2018-10-22 15:41:46,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-22 15:41:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-22 15:41:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2018-10-22 15:41:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-22 15:41:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-22 15:41:46,138 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 121 [2018-10-22 15:41:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:46,138 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-22 15:41:46,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-22 15:41:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-22 15:41:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-22 15:41:46,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:46,139 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:46,139 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:46,139 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1693456075, now seen corresponding path program 39 times [2018-10-22 15:41:46,140 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:46,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:46,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:46,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:46,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:47,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:47,107 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 [2018-10-22 15:41:47,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:41:58,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-22 15:41:58,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:41:58,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:41:58,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:58,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:41:58,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-22 15:41:58,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-22 15:41:58,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-22 15:41:58,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:41:58,476 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 43 states. [2018-10-22 15:41:58,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:41:58,806 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-22 15:41:58,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-22 15:41:58,806 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2018-10-22 15:41:58,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:41:58,808 INFO L225 Difference]: With dead ends: 133 [2018-10-22 15:41:58,808 INFO L226 Difference]: Without dead ends: 129 [2018-10-22 15:41:58,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-22 15:41:58,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-22 15:41:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2018-10-22 15:41:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-22 15:41:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-22 15:41:58,812 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 124 [2018-10-22 15:41:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:41:58,813 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-22 15:41:58,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-22 15:41:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-22 15:41:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-22 15:41:58,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:41:58,814 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1] [2018-10-22 15:41:58,814 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:41:58,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:41:58,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1583704627, now seen corresponding path program 40 times [2018-10-22 15:41:58,814 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:41:58,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:41:58,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:58,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:41:58,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:41:58,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:41:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:41:59,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:41:59,899 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 [2018-10-22 15:41:59,911 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:42:00,009 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:42:00,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:00,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:00,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:00,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-22 15:42:00,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-22 15:42:00,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-22 15:42:00,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:42:00,082 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 44 states. [2018-10-22 15:42:00,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:00,325 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-10-22 15:42:00,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-22 15:42:00,326 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2018-10-22 15:42:00,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:00,327 INFO L225 Difference]: With dead ends: 136 [2018-10-22 15:42:00,327 INFO L226 Difference]: Without dead ends: 132 [2018-10-22 15:42:00,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-22 15:42:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-22 15:42:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2018-10-22 15:42:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-22 15:42:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-22 15:42:00,331 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 127 [2018-10-22 15:42:00,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:00,332 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-22 15:42:00,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-22 15:42:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-22 15:42:00,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-22 15:42:00,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:00,333 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:00,333 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:00,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:00,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1718394763, now seen corresponding path program 41 times [2018-10-22 15:42:00,334 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:00,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:00,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:00,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:00,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:01,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:01,638 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 [2018-10-22 15:42:01,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:42:16,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-22 15:42:16,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:16,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:16,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:16,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-22 15:42:16,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-22 15:42:16,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-22 15:42:16,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:42:16,677 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 45 states. [2018-10-22 15:42:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:16,923 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-22 15:42:16,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-22 15:42:16,924 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2018-10-22 15:42:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:16,925 INFO L225 Difference]: With dead ends: 139 [2018-10-22 15:42:16,925 INFO L226 Difference]: Without dead ends: 135 [2018-10-22 15:42:16,927 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-22 15:42:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-22 15:42:16,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2018-10-22 15:42:16,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-10-22 15:42:16,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-10-22 15:42:16,930 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 130 [2018-10-22 15:42:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:16,931 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-10-22 15:42:16,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-22 15:42:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-10-22 15:42:16,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-22 15:42:16,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:16,932 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:16,932 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:16,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:16,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1664592627, now seen corresponding path program 42 times [2018-10-22 15:42:16,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:16,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:16,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:16,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:16,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:18,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:18,394 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 [2018-10-22 15:42:18,402 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-22 15:42:57,854 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-22 15:42:57,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:42:57,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:57,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:57,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-10-22 15:42:57,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-22 15:42:57,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-22 15:42:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:42:57,950 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 46 states. [2018-10-22 15:42:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:42:58,148 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-22 15:42:58,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-22 15:42:58,149 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2018-10-22 15:42:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:42:58,150 INFO L225 Difference]: With dead ends: 142 [2018-10-22 15:42:58,150 INFO L226 Difference]: Without dead ends: 138 [2018-10-22 15:42:58,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-22 15:42:58,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-22 15:42:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-22 15:42:58,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-22 15:42:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-22 15:42:58,154 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 133 [2018-10-22 15:42:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:42:58,155 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-22 15:42:58,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-22 15:42:58,155 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-22 15:42:58,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-22 15:42:58,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:42:58,156 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1] [2018-10-22 15:42:58,156 INFO L424 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:42:58,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:42:58,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1460639819, now seen corresponding path program 43 times [2018-10-22 15:42:58,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:42:58,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:42:58,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:58,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:42:58,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:42:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:59,022 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:42:59,022 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 [2018-10-22 15:42:59,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:42:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:42:59,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:42:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:42:59,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:42:59,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-10-22 15:42:59,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-22 15:42:59,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-22 15:42:59,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:42:59,285 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 47 states. [2018-10-22 15:43:00,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:00,134 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-22 15:43:00,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-22 15:43:00,134 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2018-10-22 15:43:00,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:00,135 INFO L225 Difference]: With dead ends: 145 [2018-10-22 15:43:00,135 INFO L226 Difference]: Without dead ends: 141 [2018-10-22 15:43:00,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-22 15:43:00,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-22 15:43:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2018-10-22 15:43:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-22 15:43:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-10-22 15:43:00,139 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 136 [2018-10-22 15:43:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:00,139 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-10-22 15:43:00,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-22 15:43:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-10-22 15:43:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-10-22 15:43:00,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:00,140 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:00,140 INFO L424 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:00,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:00,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1040604083, now seen corresponding path program 44 times [2018-10-22 15:43:00,141 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:00,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:00,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:00,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:43:00,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:01,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:01,957 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 [2018-10-22 15:43:01,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:43:02,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:43:02,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:02,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:02,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:02,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-10-22 15:43:02,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-22 15:43:02,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-22 15:43:02,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:43:02,246 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 48 states. [2018-10-22 15:43:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:02,572 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-10-22 15:43:02,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-22 15:43:02,573 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2018-10-22 15:43:02,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:02,574 INFO L225 Difference]: With dead ends: 148 [2018-10-22 15:43:02,574 INFO L226 Difference]: Without dead ends: 144 [2018-10-22 15:43:02,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-22 15:43:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-22 15:43:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2018-10-22 15:43:02,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-22 15:43:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-22 15:43:02,578 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 139 [2018-10-22 15:43:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:02,578 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-22 15:43:02,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-22 15:43:02,579 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-22 15:43:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-22 15:43:02,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:02,580 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:02,580 INFO L424 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:02,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:02,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2084897035, now seen corresponding path program 45 times [2018-10-22 15:43:02,580 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:02,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:02,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:02,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:02,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:03,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:03,505 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:03,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:43:38,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-22 15:43:38,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:38,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:38,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3060 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:38,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:38,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-10-22 15:43:38,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-22 15:43:38,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-22 15:43:38,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:43:38,395 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 49 states. [2018-10-22 15:43:38,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:38,635 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-22 15:43:38,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-22 15:43:38,635 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2018-10-22 15:43:38,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:38,636 INFO L225 Difference]: With dead ends: 151 [2018-10-22 15:43:38,636 INFO L226 Difference]: Without dead ends: 147 [2018-10-22 15:43:38,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-22 15:43:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-22 15:43:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2018-10-22 15:43:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-22 15:43:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-10-22 15:43:38,642 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 142 [2018-10-22 15:43:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:38,642 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-10-22 15:43:38,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-22 15:43:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-10-22 15:43:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-10-22 15:43:38,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:38,643 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:38,643 INFO L424 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:38,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:38,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1002273907, now seen corresponding path program 46 times [2018-10-22 15:43:38,644 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:38,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:38,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:38,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:38,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:39,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:39,669 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:39,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:43:39,778 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:43:39,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:39,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:39,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:39,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-10-22 15:43:39,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-22 15:43:39,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-22 15:43:39,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:43:39,933 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 50 states. [2018-10-22 15:43:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:41,203 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-10-22 15:43:41,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-22 15:43:41,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2018-10-22 15:43:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:41,205 INFO L225 Difference]: With dead ends: 154 [2018-10-22 15:43:41,205 INFO L226 Difference]: Without dead ends: 150 [2018-10-22 15:43:41,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-22 15:43:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-22 15:43:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2018-10-22 15:43:41,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-22 15:43:41,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-22 15:43:41,210 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 145 [2018-10-22 15:43:41,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:41,210 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-22 15:43:41,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-22 15:43:41,210 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-22 15:43:41,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-22 15:43:41,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:41,211 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:41,211 INFO L424 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:41,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1517869515, now seen corresponding path program 47 times [2018-10-22 15:43:41,212 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:41,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:41,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:41,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:41,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:42,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:42,356 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:42,364 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:43:55,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-22 15:43:55,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:43:55,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:43:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3337 backedges. 0 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:55,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:43:55,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-10-22 15:43:55,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-22 15:43:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-22 15:43:55,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:43:55,446 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 51 states. [2018-10-22 15:43:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:43:55,690 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-22 15:43:55,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-22 15:43:55,691 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2018-10-22 15:43:55,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:43:55,692 INFO L225 Difference]: With dead ends: 157 [2018-10-22 15:43:55,692 INFO L226 Difference]: Without dead ends: 153 [2018-10-22 15:43:55,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-22 15:43:55,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-22 15:43:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2018-10-22 15:43:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-10-22 15:43:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-10-22 15:43:55,696 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 148 [2018-10-22 15:43:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:43:55,696 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-10-22 15:43:55,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-22 15:43:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-10-22 15:43:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-10-22 15:43:55,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:43:55,698 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1] [2018-10-22 15:43:55,698 INFO L424 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:43:55,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:43:55,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1212747059, now seen corresponding path program 48 times [2018-10-22 15:43:55,698 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:43:55,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:43:55,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:55,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:43:55,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:43:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:43:56,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:43:56,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:43:56,711 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:43:56,718 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... [2018-10-22 15:44:48,802 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-22 15:44:48,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:44:48,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:44:48,853 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-22 15:44:49,054 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:44:49,054 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:44:49,059 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:44:49,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:44:49 BoogieIcfgContainer [2018-10-22 15:44:49,059 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:44:49,060 INFO L168 Benchmark]: Toolchain (without parser) took 260046.62 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -702.4 MB). Peak memory consumption was 408.0 MB. Max. memory is 7.1 GB. [2018-10-22 15:44:49,061 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:44:49,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:44:49,062 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:44:49,062 INFO L168 Benchmark]: Boogie Preprocessor took 26.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-22 15:44:49,063 INFO L168 Benchmark]: RCFGBuilder took 472.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -823.2 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:44:49,063 INFO L168 Benchmark]: TraceAbstraction took 259181.81 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 342.4 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 110.2 MB). Peak memory consumption was 452.6 MB. Max. memory is 7.1 GB. [2018-10-22 15:44:49,067 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 315.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.34 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 472.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 768.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -823.2 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 259181.81 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 342.4 MB). Free memory was 2.2 GB in the beginning and 2.1 GB in the end (delta: 110.2 MB). Peak memory consumption was 452.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 4]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 4). Cancelled while BasicCegarLoop was analyzing trace of length 152 with TraceHistMax 49,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 51 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 259.0s OverallTime, 50 OverallIterations, 49 TraceHistogramMax, 10.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 349 SDtfs, 1176 SDslu, 4410 SDs, 0 SdLazy, 3288 SolverSat, 65 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4940 GetRequests, 3717 SyntacticMatches, 0 SemanticMatches, 1223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 35.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 49 MinimizatonAttempts, 48 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 153.0s SatisfiabilityAnalysisTime, 38.6s InterpolantComputationTime, 7439 NumberOfCodeBlocks, 7439 NumberOfCodeBlocksAsserted, 680 NumberOfCheckSat, 7343 ConstructedInterpolants, 0 QuantifiedInterpolants, 2124109 SizeOfPredicates, 53 NumberOfNonLiveVariables, 17813 ConjunctsInSsa, 1246 ConjunctsInUnsatCore, 96 InterpolantComputations, 2 PerfectInterpolantSequences, 0/108288 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown