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/loops/linear_search_false-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8c3fbe1 [2018-10-22 15:36:00,290 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 15:36:00,292 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 15:36:00,305 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 15:36:00,306 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 15:36:00,307 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 15:36:00,308 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 15:36:00,311 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 15:36:00,316 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 15:36:00,321 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 15:36:00,322 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 15:36:00,323 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 15:36:00,324 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 15:36:00,325 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 15:36:00,329 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 15:36:00,333 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 15:36:00,334 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 15:36:00,336 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 15:36:00,340 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 15:36:00,344 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 15:36:00,346 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 15:36:00,348 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 15:36:00,351 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-22 15:36:00,364 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 15:36:00,393 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 15:36:00,394 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 15:36:00,395 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 15:36:00,395 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-22 15:36:00,396 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-22 15:36:00,396 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-22 15:36:00,396 INFO L133 SettingsManager]: * Use SBE=true [2018-10-22 15:36:00,397 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 15:36:00,397 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 15:36:00,397 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 15:36:00,397 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 15:36:00,397 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 15:36:00,398 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 15:36:00,398 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 15:36:00,399 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 15:36:00,399 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 15:36:00,399 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 15:36:00,399 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 15:36:00,399 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 15:36:00,400 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 15:36:00,400 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 15:36:00,400 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 15:36:00,400 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 15:36:00,400 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-22 15:36:00,401 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 15:36:00,403 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 15:36:00,403 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 15:36:00,403 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-22 15:36:00,466 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 15:36:00,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 15:36:00,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 15:36:00,485 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 15:36:00,485 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 15:36:00,486 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/linear_search_false-unreach-call.i [2018-10-22 15:36:00,546 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/09def85b8/753e3a208af546df908bb2cf245e02cf/FLAG1fe8aef0e [2018-10-22 15:36:00,977 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 15:36:00,978 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search_false-unreach-call.i [2018-10-22 15:36:00,983 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/09def85b8/753e3a208af546df908bb2cf245e02cf/FLAG1fe8aef0e [2018-10-22 15:36:00,998 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/09def85b8/753e3a208af546df908bb2cf245e02cf [2018-10-22 15:36:01,008 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 15:36:01,009 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-22 15:36:01,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:01,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 15:36:01,014 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 15:36:01,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:00" (1/1) ... [2018-10-22 15:36:01,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500ec780 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01, skipping insertion in model container [2018-10-22 15:36:01,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 03:36:00" (1/1) ... [2018-10-22 15:36:01,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 15:36:01,053 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 15:36:01,309 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:01,338 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 15:36:01,364 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 15:36:01,388 INFO L193 MainTranslator]: Completed translation [2018-10-22 15:36:01,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01 WrapperNode [2018-10-22 15:36:01,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 15:36:01,390 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:01,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 15:36:01,391 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 15:36:01,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 15:36:01,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 15:36:01,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 15:36:01,449 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 15:36:01,460 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (1/1) ... [2018-10-22 15:36:01,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 15:36:01,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 15:36:01,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 15:36:01,500 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 15:36:01,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (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 15:36:01,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 15:36:01,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 15:36:02,056 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 15:36:02,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:02 BoogieIcfgContainer [2018-10-22 15:36:02,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 15:36:02,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 15:36:02,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 15:36:02,064 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 15:36:02,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 03:36:00" (1/3) ... [2018-10-22 15:36:02,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a4bc4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:02, skipping insertion in model container [2018-10-22 15:36:02,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 03:36:01" (2/3) ... [2018-10-22 15:36:02,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31a4bc4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 03:36:02, skipping insertion in model container [2018-10-22 15:36:02,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 03:36:02" (3/3) ... [2018-10-22 15:36:02,070 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_search_false-unreach-call.i [2018-10-22 15:36:02,082 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 15:36:02,095 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 15:36:02,112 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 15:36:02,139 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 15:36:02,140 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 15:36:02,140 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 15:36:02,140 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 15:36:02,140 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 15:36:02,140 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 15:36:02,140 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 15:36:02,140 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 15:36:02,141 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 15:36:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-10-22 15:36:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-22 15:36:02,163 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:02,164 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:02,167 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:02,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1826021660, now seen corresponding path program 1 times [2018-10-22 15:36:02,176 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:02,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:02,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:02,375 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 15:36:02,378 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:02,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 15:36:02,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 15:36:02,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 15:36:02,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 15:36:02,398 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2018-10-22 15:36:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:02,413 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-22 15:36:02,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 15:36:02,415 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-22 15:36:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:02,426 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:36:02,427 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 15:36:02,430 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 15:36:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 15:36:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 15:36:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 15:36:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2018-10-22 15:36:02,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2018-10-22 15:36:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:02,470 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2018-10-22 15:36:02,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 15:36:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2018-10-22 15:36:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:36:02,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:02,471 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:02,472 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:02,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:02,473 INFO L82 PathProgramCache]: Analyzing trace with hash -408232241, now seen corresponding path program 1 times [2018-10-22 15:36:02,473 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:02,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:02,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:02,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:02,820 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 15:36:02,820 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:02,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 15:36:02,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 15:36:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 15:36:02,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:36:02,823 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand 3 states. [2018-10-22 15:36:02,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:02,928 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-10-22 15:36:02,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 15:36:02,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-10-22 15:36:02,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:02,929 INFO L225 Difference]: With dead ends: 25 [2018-10-22 15:36:02,929 INFO L226 Difference]: Without dead ends: 21 [2018-10-22 15:36:02,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 15:36:02,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-22 15:36:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2018-10-22 15:36:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-22 15:36:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2018-10-22 15:36:02,936 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2018-10-22 15:36:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:02,936 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2018-10-22 15:36:02,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 15:36:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2018-10-22 15:36:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 15:36:02,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:02,937 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:02,937 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:02,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash -408291823, now seen corresponding path program 1 times [2018-10-22 15:36:02,938 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:02,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:02,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:02,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:03,043 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 15:36:03,044 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:03,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:03,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:03,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:03,045 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 4 states. [2018-10-22 15:36:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:03,121 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2018-10-22 15:36:03,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:03,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-10-22 15:36:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:03,123 INFO L225 Difference]: With dead ends: 21 [2018-10-22 15:36:03,123 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 15:36:03,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 15:36:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 15:36:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 15:36:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2018-10-22 15:36:03,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 10 [2018-10-22 15:36:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:03,127 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2018-10-22 15:36:03,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:03,128 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2018-10-22 15:36:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:36:03,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:03,128 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:03,129 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:03,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash -380457259, now seen corresponding path program 1 times [2018-10-22 15:36:03,129 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:03,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:03,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:03,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:03,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:03,313 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:03,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:03,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:03,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:03,315 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 4 states. [2018-10-22 15:36:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:03,498 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2018-10-22 15:36:03,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:03,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-22 15:36:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:03,500 INFO L225 Difference]: With dead ends: 37 [2018-10-22 15:36:03,501 INFO L226 Difference]: Without dead ends: 26 [2018-10-22 15:36:03,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-22 15:36:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-22 15:36:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2018-10-22 15:36:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 15:36:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-22 15:36:03,507 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2018-10-22 15:36:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:03,509 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-22 15:36:03,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-22 15:36:03,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:36:03,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:03,511 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:03,511 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:03,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash -323198957, now seen corresponding path program 1 times [2018-10-22 15:36:03,512 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:03,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:03,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:03,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:03,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:03,802 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 15:36:03,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-22 15:36:03,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-22 15:36:03,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-22 15:36:03,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:03,804 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2018-10-22 15:36:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:04,115 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-10-22 15:36:04,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 15:36:04,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-10-22 15:36:04,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:04,117 INFO L225 Difference]: With dead ends: 40 [2018-10-22 15:36:04,117 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:36:04,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-22 15:36:04,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:36:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2018-10-22 15:36:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-22 15:36:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-22 15:36:04,123 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2018-10-22 15:36:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:04,124 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-22 15:36:04,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-22 15:36:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-22 15:36:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:36:04,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:04,125 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:04,125 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:04,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:04,125 INFO L82 PathProgramCache]: Analyzing trace with hash 299601111, now seen corresponding path program 1 times [2018-10-22 15:36:04,126 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:04,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:04,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:04,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:04,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:04,458 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-22 15:36:04,790 WARN L179 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2018-10-22 15:36:04,993 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2018-10-22 15:36:05,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:05,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:05,079 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 15:36:05,100 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:05,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:05,575 WARN L179 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-10-22 15:36:05,742 WARN L179 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 15 [2018-10-22 15:36:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:05,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:05,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2018-10-22 15:36:05,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:36:05,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:36:05,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:36:05,793 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 11 states. [2018-10-22 15:36:06,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:06,468 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-22 15:36:06,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:36:06,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2018-10-22 15:36:06,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:06,470 INFO L225 Difference]: With dead ends: 36 [2018-10-22 15:36:06,470 INFO L226 Difference]: Without dead ends: 31 [2018-10-22 15:36:06,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:36:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-22 15:36:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-10-22 15:36:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:36:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-10-22 15:36:06,476 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-10-22 15:36:06,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:06,477 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-10-22 15:36:06,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:36:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-10-22 15:36:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 15:36:06,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:06,478 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:06,479 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:06,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 356859413, now seen corresponding path program 1 times [2018-10-22 15:36:06,480 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:06,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:06,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:06,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:06,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:06,752 WARN L179 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 26 [2018-10-22 15:36:07,085 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2018-10-22 15:36:07,270 WARN L179 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 22 [2018-10-22 15:36:07,521 WARN L179 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2018-10-22 15:36:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:07,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:07,525 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 15:36:07,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:07,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:07,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:07,603 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:36:07,604 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,639 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-10-22 15:36:07,653 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-22 15:36:07,654 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,666 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,677 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,678 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:109, output treesize:24 [2018-10-22 15:36:07,755 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2018-10-22 15:36:07,764 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2018-10-22 15:36:07,765 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,774 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,812 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2018-10-22 15:36:07,820 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2018-10-22 15:36:07,821 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,829 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:36:07,854 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-10-22 15:36:07,855 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:85, output treesize:44 [2018-10-22 15:36:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:08,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:08,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2018-10-22 15:36:08,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:36:08,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:36:08,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-22 15:36:08,150 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 11 states. [2018-10-22 15:36:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:08,656 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-22 15:36:08,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:36:08,657 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2018-10-22 15:36:08,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:08,658 INFO L225 Difference]: With dead ends: 31 [2018-10-22 15:36:08,658 INFO L226 Difference]: Without dead ends: 25 [2018-10-22 15:36:08,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-10-22 15:36:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-22 15:36:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-22 15:36:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-22 15:36:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-22 15:36:08,665 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2018-10-22 15:36:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:08,666 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-22 15:36:08,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:36:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-22 15:36:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:36:08,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:08,667 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:08,667 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:08,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:08,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1720764661, now seen corresponding path program 1 times [2018-10-22 15:36:08,668 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:08,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:08,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:08,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:08,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:08,787 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 15:36:08,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:08,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:08,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:08,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-22 15:36:08,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 15:36:08,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 15:36:08,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:08,892 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-10-22 15:36:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:08,967 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-22 15:36:08,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 15:36:08,968 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-10-22 15:36:08,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:08,969 INFO L225 Difference]: With dead ends: 45 [2018-10-22 15:36:08,969 INFO L226 Difference]: Without dead ends: 36 [2018-10-22 15:36:08,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-22 15:36:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-22 15:36:08,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2018-10-22 15:36:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:36:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-22 15:36:08,974 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2018-10-22 15:36:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:08,974 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-22 15:36:08,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 15:36:08,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-22 15:36:08,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:36:08,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:08,976 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:08,976 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:08,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:08,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1097964593, now seen corresponding path program 2 times [2018-10-22 15:36:08,976 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:08,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:08,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 15:36:08,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:08,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:09,330 WARN L179 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-22 15:36:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:09,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:09,559 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 15:36:09,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:09,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-10-22 15:36:09,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:09,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:10,128 WARN L179 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-10-22 15:36:11,268 WARN L179 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 34 [2018-10-22 15:36:12,088 WARN L179 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-10-22 15:36:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-10-22 15:36:12,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:36:12,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2018-10-22 15:36:12,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-22 15:36:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-22 15:36:12,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2018-10-22 15:36:12,130 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 12 states. [2018-10-22 15:36:12,524 WARN L179 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2018-10-22 15:36:13,935 WARN L179 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-10-22 15:36:14,064 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2018-10-22 15:36:17,789 WARN L179 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2018-10-22 15:36:22,153 WARN L179 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2018-10-22 15:36:24,696 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2018-10-22 15:36:28,926 WARN L179 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-10-22 15:36:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:36:28,933 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2018-10-22 15:36:28,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-22 15:36:28,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2018-10-22 15:36:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:36:28,936 INFO L225 Difference]: With dead ends: 36 [2018-10-22 15:36:28,936 INFO L226 Difference]: Without dead ends: 30 [2018-10-22 15:36:28,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2018-10-22 15:36:28,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-22 15:36:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2018-10-22 15:36:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-22 15:36:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-10-22 15:36:28,944 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 20 [2018-10-22 15:36:28,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:36:28,944 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-10-22 15:36:28,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-22 15:36:28,944 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-10-22 15:36:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-22 15:36:28,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:36:28,945 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:36:28,945 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:36:28,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:36:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1040706291, now seen corresponding path program 2 times [2018-10-22 15:36:28,947 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:36:28,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:36:28,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:36:28,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:36:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:36:37,780 WARN L179 SmtUtils]: Spent 8.56 s on a formula simplification. DAG size of input: 119 DAG size of output: 49 [2018-10-22 15:36:38,216 WARN L179 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 68 [2018-10-22 15:36:39,166 WARN L179 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 65 [2018-10-22 15:36:40,059 WARN L179 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 109 [2018-10-22 15:36:42,569 WARN L179 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 71 [2018-10-22 15:36:43,063 WARN L179 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 67 [2018-10-22 15:36:43,769 WARN L179 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 45 [2018-10-22 15:36:44,078 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 31 [2018-10-22 15:36:44,389 WARN L179 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 41 [2018-10-22 15:36:46,711 WARN L179 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 90 DAG size of output: 20 [2018-10-22 15:36:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:36:46,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:36:46,718 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 15:36:46,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:36:46,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:36:46,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:36:46,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:36:46,789 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:36:46,789 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:36:46,795 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:36:46,795 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,910 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 38 [2018-10-22 15:37:00,913 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-22 15:37:00,913 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,927 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,932 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 35 [2018-10-22 15:37:00,936 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-22 15:37:00,936 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,947 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:00,984 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2018-10-22 15:37:00,984 INFO L202 ElimStorePlain]: Needed 7 recursive calls to eliminate 2 variables, input treesize:286, output treesize:72 [2018-10-22 15:37:08,001 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2018-10-22 15:37:08,008 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2018-10-22 15:37:08,013 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:08,017 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 77 [2018-10-22 15:37:08,017 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,040 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,146 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2018-10-22 15:37:08,152 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 54 [2018-10-22 15:37:08,153 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,180 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,280 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 60 [2018-10-22 15:37:08,285 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:08,285 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 73 [2018-10-22 15:37:08,286 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,304 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,371 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 59 [2018-10-22 15:37:08,375 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:37:08,377 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 77 [2018-10-22 15:37:08,378 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,393 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:37:08,437 INFO L267 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-2 vars, End of recursive call: 2 dim-0 vars, and 3 xjuncts. [2018-10-22 15:37:08,437 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:269, output treesize:130 [2018-10-22 15:37:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:11,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:11,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2018-10-22 15:37:11,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-22 15:37:11,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-22 15:37:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=349, Unknown=4, NotChecked=0, Total=420 [2018-10-22 15:37:11,155 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 21 states. [2018-10-22 15:37:11,384 WARN L179 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 45 [2018-10-22 15:37:11,592 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 46 [2018-10-22 15:37:13,902 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 46 [2018-10-22 15:37:14,748 WARN L179 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 47 [2018-10-22 15:37:16,373 WARN L179 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 158 DAG size of output: 48 [2018-10-22 15:37:19,288 WARN L179 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 54 [2018-10-22 15:37:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:19,796 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-10-22 15:37:19,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-22 15:37:19,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-10-22 15:37:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:19,798 INFO L225 Difference]: With dead ends: 43 [2018-10-22 15:37:19,798 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:37:19,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=135, Invalid=616, Unknown=5, NotChecked=0, Total=756 [2018-10-22 15:37:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:37:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-22 15:37:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:37:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2018-10-22 15:37:19,805 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2018-10-22 15:37:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:19,805 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2018-10-22 15:37:19,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-22 15:37:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2018-10-22 15:37:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-22 15:37:19,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:19,806 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:19,807 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:19,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:19,807 INFO L82 PathProgramCache]: Analyzing trace with hash -532415725, now seen corresponding path program 2 times [2018-10-22 15:37:19,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:19,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:19,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:19,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:20,721 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:20,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:20,722 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 15:37:20,729 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 15:37:20,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 15:37:20,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:20,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:20,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:20,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-10-22 15:37:20,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 15:37:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 15:37:20,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:37:20,801 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 9 states. [2018-10-22 15:37:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:20,922 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2018-10-22 15:37:20,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 15:37:20,923 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-10-22 15:37:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:20,923 INFO L225 Difference]: With dead ends: 44 [2018-10-22 15:37:20,923 INFO L226 Difference]: Without dead ends: 35 [2018-10-22 15:37:20,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-10-22 15:37:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-22 15:37:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2018-10-22 15:37:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-22 15:37:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-22 15:37:20,930 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2018-10-22 15:37:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:20,930 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-22 15:37:20,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 15:37:20,931 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-22 15:37:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:37:20,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:20,932 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:20,932 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:20,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:20,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1097890827, now seen corresponding path program 3 times [2018-10-22 15:37:20,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:20,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:20,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:20,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:20,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:23,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:37:23,949 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 15:37:23,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:37:24,203 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:37:24,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:37:24,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:37:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:37:24,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:37:24,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-10-22 15:37:24,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-22 15:37:24,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-22 15:37:24,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2018-10-22 15:37:24,285 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 11 states. [2018-10-22 15:37:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:37:24,466 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2018-10-22 15:37:24,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 15:37:24,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2018-10-22 15:37:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:37:24,468 INFO L225 Difference]: With dead ends: 55 [2018-10-22 15:37:24,468 INFO L226 Difference]: Without dead ends: 46 [2018-10-22 15:37:24,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2018-10-22 15:37:24,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-22 15:37:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2018-10-22 15:37:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-22 15:37:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2018-10-22 15:37:24,476 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 30 [2018-10-22 15:37:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:37:24,476 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2018-10-22 15:37:24,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-22 15:37:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2018-10-22 15:37:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-22 15:37:24,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:37:24,477 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:37:24,477 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:37:24,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:37:24,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1777949197, now seen corresponding path program 3 times [2018-10-22 15:37:24,478 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:37:24,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:37:24,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:24,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:37:24,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:37:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:37:29,490 WARN L179 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 136 DAG size of output: 43 [2018-10-22 15:37:43,856 WARN L179 SmtUtils]: Spent 14.31 s on a formula simplification. DAG size of input: 163 DAG size of output: 49 [2018-10-22 15:37:56,481 WARN L179 SmtUtils]: Spent 12.54 s on a formula simplification. DAG size of input: 192 DAG size of output: 57 [2018-10-22 15:38:05,215 WARN L179 SmtUtils]: Spent 8.68 s on a formula simplification. DAG size of input: 195 DAG size of output: 55 [2018-10-22 15:38:07,786 WARN L179 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 195 DAG size of output: 57 [2018-10-22 15:38:10,187 WARN L179 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 195 DAG size of output: 60 [2018-10-22 15:38:12,690 WARN L179 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 184 DAG size of output: 47 [2018-10-22 15:38:17,284 WARN L179 SmtUtils]: Spent 4.41 s on a formula simplification. DAG size of input: 181 DAG size of output: 43 [2018-10-22 15:38:18,053 WARN L179 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 47 [2018-10-22 15:38:18,354 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 39 [2018-10-22 15:38:19,034 WARN L179 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 33 [2018-10-22 15:38:27,332 WARN L179 SmtUtils]: Spent 8.21 s on a formula simplification. DAG size of input: 148 DAG size of output: 32 [2018-10-22 15:38:49,980 WARN L179 SmtUtils]: Spent 22.53 s on a formula simplification. DAG size of input: 167 DAG size of output: 48 [2018-10-22 15:38:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:38:50,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:38:50,208 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 15:38:50,217 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 15:39:08,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-22 15:39:08,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:39:08,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:39:08,370 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:39:08,370 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,372 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:39:08,372 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,377 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2018-10-22 15:39:08,385 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,385 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,410 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,424 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 59 [2018-10-22 15:39:08,428 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,428 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,472 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,475 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 56 [2018-10-22 15:39:08,479 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,480 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,508 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,510 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:39:08,510 INFO L267 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,516 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2018-10-22 15:39:08,520 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,520 INFO L267 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,554 INFO L267 ElimStorePlain]: Start of recursive call 11: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,559 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 58 [2018-10-22 15:39:08,564 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,564 INFO L267 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,598 INFO L267 ElimStorePlain]: Start of recursive call 13: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,603 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 59 [2018-10-22 15:39:08,606 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,606 INFO L267 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,632 INFO L267 ElimStorePlain]: Start of recursive call 15: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,634 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-22 15:39:08,634 INFO L267 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,638 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 60 [2018-10-22 15:39:08,641 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,641 INFO L267 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,665 INFO L267 ElimStorePlain]: Start of recursive call 18: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:08,671 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 56 [2018-10-22 15:39:08,675 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2018-10-22 15:39:08,675 INFO L267 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:10,708 INFO L267 ElimStorePlain]: Start of recursive call 20: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:17,035 INFO L267 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2018-10-22 15:39:17,036 INFO L202 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:1168, output treesize:193 [2018-10-22 15:39:17,222 WARN L179 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2018-10-22 15:39:17,439 WARN L179 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-10-22 15:39:17,651 WARN L179 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2018-10-22 15:39:18,087 WARN L179 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2018-10-22 15:39:19,118 WARN L179 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2018-10-22 15:39:19,619 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2018-10-22 15:39:20,544 WARN L179 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2018-10-22 15:39:21,408 WARN L179 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2018-10-22 15:39:23,933 WARN L179 SmtUtils]: Spent 775.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2018-10-22 15:39:23,954 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2018-10-22 15:39:23,968 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:23,969 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:23,972 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:23,974 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:23,981 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 173 [2018-10-22 15:39:23,982 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,028 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,240 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 101 [2018-10-22 15:39:24,256 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,257 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,267 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,274 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 12 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 157 [2018-10-22 15:39:24,275 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,351 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,558 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 85 [2018-10-22 15:39:24,566 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,567 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,568 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,569 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,570 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,571 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,582 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 177 [2018-10-22 15:39:24,583 INFO L267 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,640 INFO L267 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,645 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 83 [2018-10-22 15:39:24,650 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,651 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,652 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,654 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,655 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,656 INFO L700 Elim1Store]: detected not equals via solver [2018-10-22 15:39:24,668 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 14 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 177 [2018-10-22 15:39:24,669 INFO L267 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,760 INFO L267 ElimStorePlain]: Start of recursive call 8: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-22 15:39:24,874 INFO L267 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-2 vars, End of recursive call: 4 dim-0 vars, and 4 xjuncts. [2018-10-22 15:39:24,874 INFO L202 ElimStorePlain]: Needed 9 recursive calls to eliminate 10 variables, input treesize:425, output treesize:227 [2018-10-22 15:39:25,375 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2018-10-22 15:39:28,787 WARN L179 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 43 [2018-10-22 15:39:28,800 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:39:28,822 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:39:28,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2018-10-22 15:39:28,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-22 15:39:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-22 15:39:28,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2018-10-22 15:39:28,824 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 29 states. [2018-10-22 15:39:29,057 WARN L179 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2018-10-22 15:39:33,130 WARN L179 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 91 DAG size of output: 83 [2018-10-22 15:39:35,706 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2018-10-22 15:39:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:39:35,950 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2018-10-22 15:39:35,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-22 15:39:35,950 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2018-10-22 15:39:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:39:35,951 INFO L225 Difference]: With dead ends: 53 [2018-10-22 15:39:35,951 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:39:35,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 99.0s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2018-10-22 15:39:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:39:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-22 15:39:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:39:35,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2018-10-22 15:39:35,961 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 30 [2018-10-22 15:39:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:39:35,961 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2018-10-22 15:39:35,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-22 15:39:35,962 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2018-10-22 15:39:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-22 15:39:35,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:39:35,963 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:39:35,963 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:39:35,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:39:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash -817506797, now seen corresponding path program 4 times [2018-10-22 15:39:35,964 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:39:35,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:39:35,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:39:35,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:39:35,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:39:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:39:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:39:40,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:39:40,465 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 15:39:40,474 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 15:39:40,503 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 15:39:40,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:39:40,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:39:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:39:40,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:39:40,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-22 15:39:40,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-22 15:39:40,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-22 15:39:40,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2018-10-22 15:39:40,606 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 13 states. [2018-10-22 15:39:40,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:39:40,794 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2018-10-22 15:39:40,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-22 15:39:40,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2018-10-22 15:39:40,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:39:40,796 INFO L225 Difference]: With dead ends: 54 [2018-10-22 15:39:40,796 INFO L226 Difference]: Without dead ends: 45 [2018-10-22 15:39:40,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2018-10-22 15:39:40,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-22 15:39:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2018-10-22 15:39:40,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-22 15:39:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2018-10-22 15:39:40,805 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 35 [2018-10-22 15:39:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:39:40,805 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2018-10-22 15:39:40,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-22 15:39:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2018-10-22 15:39:40,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:39:40,806 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:39:40,806 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:39:40,807 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:39:40,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:39:40,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1080000779, now seen corresponding path program 5 times [2018-10-22 15:39:40,807 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:39:40,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:39:40,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:39:40,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:39:40,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:39:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:39:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:39:43,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 15:39:43,990 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 15:39:43,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-22 15:39:44,302 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-22 15:39:44,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 15:39:44,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 15:39:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 24 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 15:39:44,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-22 15:39:44,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2018-10-22 15:39:44,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-22 15:39:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-22 15:39:44,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2018-10-22 15:39:44,409 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 15 states. [2018-10-22 15:39:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 15:39:44,698 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-22 15:39:44,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 15:39:44,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-22 15:39:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 15:39:44,700 INFO L225 Difference]: With dead ends: 65 [2018-10-22 15:39:44,700 INFO L226 Difference]: Without dead ends: 56 [2018-10-22 15:39:44,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=33, Invalid=176, Unknown=1, NotChecked=0, Total=210 [2018-10-22 15:39:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-22 15:39:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2018-10-22 15:39:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-22 15:39:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2018-10-22 15:39:44,709 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 40 [2018-10-22 15:39:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 15:39:44,709 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2018-10-22 15:39:44,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-22 15:39:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2018-10-22 15:39:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-22 15:39:44,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 15:39:44,710 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 15:39:44,710 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 15:39:44,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 15:39:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1760059149, now seen corresponding path program 4 times [2018-10-22 15:39:44,711 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-22 15:39:44,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-22 15:39:44,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:39:44,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 15:39:44,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 15:39:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 15:39:51,369 WARN L179 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 127 DAG size of output: 43 [2018-10-22 15:39:55,690 WARN L179 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 159 DAG size of output: 49 [2018-10-22 15:39:56,929 WARN L179 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 191 DAG size of output: 62 [2018-10-22 15:40:05,417 WARN L179 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 195 DAG size of output: 62 [2018-10-22 15:40:12,137 WARN L179 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 196 DAG size of output: 63 [2018-10-22 15:40:21,986 WARN L179 SmtUtils]: Spent 7.73 s on a formula simplification. DAG size of input: 218 DAG size of output: 65 [2018-10-22 15:40:31,383 WARN L179 SmtUtils]: Spent 6.81 s on a formula simplification. DAG size of input: 211 DAG size of output: 56 Received shutdown request... [2018-10-22 15:40:37,867 WARN L187 SmtUtils]: Removed 6 from assertion stack [2018-10-22 15:40:37,868 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-22 15:40:37,871 WARN L205 ceAbstractionStarter]: Timeout [2018-10-22 15:40:37,871 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 03:40:37 BoogieIcfgContainer [2018-10-22 15:40:37,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 15:40:37,872 INFO L168 Benchmark]: Toolchain (without parser) took 276864.11 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 979.4 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -506.4 MB). Peak memory consumption was 472.9 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:37,873 INFO L168 Benchmark]: CDTParser took 0.22 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 15:40:37,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 379.13 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 15:40:37,874 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.31 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 15:40:37,875 INFO L168 Benchmark]: Boogie Preprocessor took 50.34 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 15:40:37,875 INFO L168 Benchmark]: RCFGBuilder took 558.41 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 733.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:37,875 INFO L168 Benchmark]: TraceAbstraction took 275813.09 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 246.4 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.9 MB). Peak memory consumption was 507.3 MB. Max. memory is 7.1 GB. [2018-10-22 15:40:37,883 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 379.13 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 57.31 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 50.34 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 558.41 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 733.0 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -777.9 MB). Peak memory consumption was 27.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 275813.09 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 246.4 MB). Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 260.9 MB). Peak memory consumption was 507.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 7,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 200. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. TIMEOUT Result, 275.7s OverallTime, 16 OverallIterations, 7 TraceHistogramMax, 35.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 191 SDtfs, 235 SDslu, 701 SDs, 0 SdLazy, 1467 SolverSat, 77 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 11.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 384 GetRequests, 200 SyntacticMatches, 30 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 164.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=15, 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: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 64 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 19.2s SatisfiabilityAnalysisTime, 167.1s InterpolantComputationTime, 557 NumberOfCodeBlocks, 547 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 532 ConstructedInterpolants, 38 QuantifiedInterpolants, 308229 SizeOfPredicates, 92 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 283 ConjunctsInUnsatCore, 25 InterpolantComputations, 5 PerfectInterpolantSequences, 183/678 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown