java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1dbac8b [2018-10-26 22:22:33,483 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-26 22:22:33,485 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-26 22:22:33,497 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-26 22:22:33,497 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-26 22:22:33,499 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-26 22:22:33,500 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-26 22:22:33,502 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-26 22:22:33,503 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-26 22:22:33,504 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-26 22:22:33,505 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-26 22:22:33,505 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-26 22:22:33,506 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-26 22:22:33,507 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-26 22:22:33,509 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-26 22:22:33,509 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-26 22:22:33,510 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-26 22:22:33,512 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-26 22:22:33,514 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-26 22:22:33,516 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-26 22:22:33,517 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-26 22:22:33,519 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-26 22:22:33,521 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-26 22:22:33,531 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 [2018-10-26 22:22:33,546 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-26 22:22:33,547 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-26 22:22:33,547 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-26 22:22:33,548 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-26 22:22:33,548 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-26 22:22:33,548 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-26 22:22:33,549 INFO L133 SettingsManager]: * Use SBE=true [2018-10-26 22:22:33,549 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-26 22:22:33,549 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-26 22:22:33,549 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-26 22:22:33,549 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-26 22:22:33,550 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-26 22:22:33,551 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-26 22:22:33,551 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-26 22:22:33,551 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-26 22:22:33,551 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-26 22:22:33,552 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-26 22:22:33,552 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-26 22:22:33,552 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-26 22:22:33,552 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-26 22:22:33,552 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-26 22:22:33,553 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-26 22:22:33,554 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-26 22:22:33,554 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-26 22:22:33,554 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-26 22:22:33,555 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-26 22:22:33,555 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-26 22:22:33,555 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-26 22:22:33,604 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-26 22:22:33,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-26 22:22:33,624 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-26 22:22:33,625 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-26 22:22:33,626 INFO L276 PluginConnector]: CDTParser initialized [2018-10-26 22:22:33,626 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-10-26 22:22:33,681 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c2fb4f556/933aad2da08a4c83ab479a0462a6a721/FLAGea349ee0b [2018-10-26 22:22:34,099 INFO L298 CDTParser]: Found 1 translation units. [2018-10-26 22:22:34,099 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_false-unreach-call2_true-termination.i [2018-10-26 22:22:34,104 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c2fb4f556/933aad2da08a4c83ab479a0462a6a721/FLAGea349ee0b [2018-10-26 22:22:34,119 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/c2fb4f556/933aad2da08a4c83ab479a0462a6a721 [2018-10-26 22:22:34,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-26 22:22:34,132 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-26 22:22:34,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-26 22:22:34,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-26 22:22:34,138 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-26 22:22:34,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,142 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ee9ef4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34, skipping insertion in model container [2018-10-26 22:22:34,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-26 22:22:34,174 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-26 22:22:34,373 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:22:34,376 INFO L189 MainTranslator]: Completed pre-run [2018-10-26 22:22:34,393 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-26 22:22:34,413 INFO L193 MainTranslator]: Completed translation [2018-10-26 22:22:34,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34 WrapperNode [2018-10-26 22:22:34,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-26 22:22:34,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-26 22:22:34,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-26 22:22:34,414 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-26 22:22:34,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,450 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-26 22:22:34,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-26 22:22:34,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-26 22:22:34,451 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-26 22:22:34,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (1/1) ... [2018-10-26 22:22:34,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-26 22:22:34,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-26 22:22:34,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-26 22:22:34,473 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-26 22:22:34,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (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 [2018-10-26 22:22:34,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-10-26 22:22:34,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-26 22:22:34,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-26 22:22:34,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-10-26 22:22:34,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-10-26 22:22:34,945 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-26 22:22:34,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:22:34 BoogieIcfgContainer [2018-10-26 22:22:34,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-26 22:22:34,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-26 22:22:34,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-26 22:22:34,950 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-26 22:22:34,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:22:34" (1/3) ... [2018-10-26 22:22:34,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1937602b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:22:34, skipping insertion in model container [2018-10-26 22:22:34,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:22:34" (2/3) ... [2018-10-26 22:22:34,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1937602b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:22:34, skipping insertion in model container [2018-10-26 22:22:34,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:22:34" (3/3) ... [2018-10-26 22:22:34,954 INFO L112 eAbstractionObserver]: Analyzing ICFG array_false-unreach-call2_true-termination.i [2018-10-26 22:22:34,964 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-26 22:22:34,972 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-26 22:22:34,986 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-26 22:22:35,014 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-26 22:22:35,015 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-26 22:22:35,015 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-26 22:22:35,015 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-26 22:22:35,015 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-26 22:22:35,015 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-26 22:22:35,016 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-26 22:22:35,016 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-26 22:22:35,016 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-26 22:22:35,030 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2018-10-26 22:22:35,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-26 22:22:35,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:35,038 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:35,041 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:35,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:35,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2021094374, now seen corresponding path program 1 times [2018-10-26 22:22:35,048 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:35,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:35,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:35,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:35,171 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:22:35,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-26 22:22:35,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-26 22:22:35,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-26 22:22:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-26 22:22:35,190 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2018-10-26 22:22:35,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:35,205 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-26 22:22:35,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-26 22:22:35,207 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-10-26 22:22:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:35,217 INFO L225 Difference]: With dead ends: 38 [2018-10-26 22:22:35,217 INFO L226 Difference]: Without dead ends: 16 [2018-10-26 22:22:35,221 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 [2018-10-26 22:22:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-26 22:22:35,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-26 22:22:35,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-26 22:22:35,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-26 22:22:35,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2018-10-26 22:22:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:35,259 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-26 22:22:35,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-26 22:22:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-26 22:22:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-26 22:22:35,261 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:35,261 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:35,261 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:35,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:35,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1064529813, now seen corresponding path program 1 times [2018-10-26 22:22:35,262 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:35,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:35,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:35,398 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-26 22:22:35,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-26 22:22:35,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-26 22:22:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-26 22:22:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:22:35,402 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2018-10-26 22:22:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:35,525 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-26 22:22:35,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-26 22:22:35,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-10-26 22:22:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:35,527 INFO L225 Difference]: With dead ends: 27 [2018-10-26 22:22:35,527 INFO L226 Difference]: Without dead ends: 21 [2018-10-26 22:22:35,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-26 22:22:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-26 22:22:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-26 22:22:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-26 22:22:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-26 22:22:35,536 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2018-10-26 22:22:35,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:35,536 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-26 22:22:35,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-26 22:22:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-26 22:22:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-26 22:22:35,537 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:35,538 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:35,538 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:35,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash 55281387, now seen corresponding path program 1 times [2018-10-26 22:22:35,539 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:35,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:35,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:35,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:35,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:35,640 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 [2018-10-26 22:22:35,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:35,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:35,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:35,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:35,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-10-26 22:22:35,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-26 22:22:35,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-26 22:22:35,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:22:35,768 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2018-10-26 22:22:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:35,919 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-26 22:22:35,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-26 22:22:35,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-10-26 22:22:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:35,922 INFO L225 Difference]: With dead ends: 32 [2018-10-26 22:22:35,922 INFO L226 Difference]: Without dead ends: 26 [2018-10-26 22:22:35,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-26 22:22:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-26 22:22:35,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-10-26 22:22:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-26 22:22:35,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-26 22:22:35,928 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2018-10-26 22:22:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:35,928 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-26 22:22:35,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-26 22:22:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-26 22:22:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-26 22:22:35,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:35,930 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:35,930 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:35,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:35,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1196780203, now seen corresponding path program 2 times [2018-10-26 22:22:35,931 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:35,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:35,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:35,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:36,020 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 [2018-10-26 22:22:36,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:36,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:36,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:36,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:36,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-10-26 22:22:36,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-26 22:22:36,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-26 22:22:36,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:22:36,238 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2018-10-26 22:22:36,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:36,368 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-26 22:22:36,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-26 22:22:36,368 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-10-26 22:22:36,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:36,369 INFO L225 Difference]: With dead ends: 37 [2018-10-26 22:22:36,369 INFO L226 Difference]: Without dead ends: 31 [2018-10-26 22:22:36,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-26 22:22:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-26 22:22:36,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-26 22:22:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-26 22:22:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-26 22:22:36,376 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2018-10-26 22:22:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:36,376 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-26 22:22:36,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-26 22:22:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-26 22:22:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-26 22:22:36,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:36,377 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:36,378 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:36,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash 526776619, now seen corresponding path program 3 times [2018-10-26 22:22:36,378 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:36,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:36,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:36,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:36,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:36,484 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 [2018-10-26 22:22:36,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:36,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-26 22:22:36,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:36,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:36,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-10-26 22:22:36,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-26 22:22:36,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-26 22:22:36,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:22:36,648 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 7 states. [2018-10-26 22:22:36,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:36,762 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-26 22:22:36,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-26 22:22:36,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-10-26 22:22:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:36,765 INFO L225 Difference]: With dead ends: 42 [2018-10-26 22:22:36,765 INFO L226 Difference]: Without dead ends: 36 [2018-10-26 22:22:36,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-26 22:22:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-26 22:22:36,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-10-26 22:22:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-26 22:22:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-26 22:22:36,772 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2018-10-26 22:22:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:36,772 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-26 22:22:36,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-26 22:22:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-26 22:22:36,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-26 22:22:36,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:36,774 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:36,775 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:36,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:36,775 INFO L82 PathProgramCache]: Analyzing trace with hash 310217493, now seen corresponding path program 4 times [2018-10-26 22:22:36,775 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:36,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:36,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:36,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:36,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:36,900 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:36,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:36,901 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 [2018-10-26 22:22:36,913 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:36,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:36,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:36,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:37,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:37,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-10-26 22:22:37,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-26 22:22:37,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-26 22:22:37,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:22:37,007 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 8 states. [2018-10-26 22:22:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:37,177 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-26 22:22:37,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-26 22:22:37,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2018-10-26 22:22:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:37,179 INFO L225 Difference]: With dead ends: 47 [2018-10-26 22:22:37,179 INFO L226 Difference]: Without dead ends: 41 [2018-10-26 22:22:37,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-26 22:22:37,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-26 22:22:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-10-26 22:22:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-26 22:22:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-26 22:22:37,185 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-10-26 22:22:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:37,186 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-26 22:22:37,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-26 22:22:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-26 22:22:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-26 22:22:37,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:37,187 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:37,188 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:37,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1942395755, now seen corresponding path program 5 times [2018-10-26 22:22:37,188 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:37,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:37,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:37,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:37,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:37,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:37,492 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 [2018-10-26 22:22:37,512 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:37,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-26 22:22:37,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:37,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:37,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:37,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-10-26 22:22:37,624 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-26 22:22:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-26 22:22:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:22:37,625 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 9 states. [2018-10-26 22:22:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:37,724 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-26 22:22:37,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-26 22:22:37,724 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2018-10-26 22:22:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:37,726 INFO L225 Difference]: With dead ends: 52 [2018-10-26 22:22:37,726 INFO L226 Difference]: Without dead ends: 46 [2018-10-26 22:22:37,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-26 22:22:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-26 22:22:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2018-10-26 22:22:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-26 22:22:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-26 22:22:37,732 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2018-10-26 22:22:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:37,733 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-26 22:22:37,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-26 22:22:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-26 22:22:37,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-26 22:22:37,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:37,734 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:37,735 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:37,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1483231445, now seen corresponding path program 6 times [2018-10-26 22:22:37,735 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:37,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:37,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:37,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:37,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:37,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:37,990 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-26 22:22:37,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:22:38,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-26 22:22:38,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:38,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:38,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:38,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-10-26 22:22:38,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-26 22:22:38,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-26 22:22:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:22:38,125 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 10 states. [2018-10-26 22:22:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:38,228 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-26 22:22:38,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-26 22:22:38,229 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-10-26 22:22:38,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:38,231 INFO L225 Difference]: With dead ends: 57 [2018-10-26 22:22:38,231 INFO L226 Difference]: Without dead ends: 51 [2018-10-26 22:22:38,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-26 22:22:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-26 22:22:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-10-26 22:22:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-26 22:22:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-26 22:22:38,237 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2018-10-26 22:22:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:38,237 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-26 22:22:38,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-26 22:22:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-26 22:22:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-26 22:22:38,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:38,240 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:38,240 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:38,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:38,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1032753749, now seen corresponding path program 7 times [2018-10-26 22:22:38,240 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:38,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:38,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:38,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:38,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:38,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:38,783 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 [2018-10-26 22:22:38,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:38,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:38,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:38,901 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-10-26 22:22:38,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-26 22:22:38,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-26 22:22:38,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:22:38,902 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 11 states. [2018-10-26 22:22:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:39,297 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-26 22:22:39,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-26 22:22:39,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-10-26 22:22:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:39,299 INFO L225 Difference]: With dead ends: 62 [2018-10-26 22:22:39,299 INFO L226 Difference]: Without dead ends: 56 [2018-10-26 22:22:39,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-26 22:22:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-26 22:22:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2018-10-26 22:22:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-26 22:22:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-26 22:22:39,305 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2018-10-26 22:22:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:39,306 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-26 22:22:39,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-26 22:22:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-26 22:22:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-26 22:22:39,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:39,307 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:39,307 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:39,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1793517205, now seen corresponding path program 8 times [2018-10-26 22:22:39,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:39,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:39,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:39,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:39,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:39,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:39,605 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 [2018-10-26 22:22:39,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:39,667 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:39,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:39,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:39,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:39,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-10-26 22:22:39,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-26 22:22:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-26 22:22:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:22:39,729 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 12 states. [2018-10-26 22:22:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:39,839 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-26 22:22:39,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-26 22:22:39,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-26 22:22:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:39,840 INFO L225 Difference]: With dead ends: 67 [2018-10-26 22:22:39,840 INFO L226 Difference]: Without dead ends: 61 [2018-10-26 22:22:39,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-26 22:22:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-26 22:22:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2018-10-26 22:22:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-26 22:22:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-26 22:22:39,847 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2018-10-26 22:22:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:39,847 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-26 22:22:39,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-26 22:22:39,848 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-26 22:22:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-26 22:22:39,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:39,849 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:39,849 INFO L424 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:39,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:39,850 INFO L82 PathProgramCache]: Analyzing trace with hash 409628651, now seen corresponding path program 9 times [2018-10-26 22:22:39,850 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:39,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:39,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:39,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:39,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:40,040 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:40,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:40,041 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 [2018-10-26 22:22:40,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:40,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-26 22:22:40,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:40,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:40,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:40,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-10-26 22:22:40,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-26 22:22:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-26 22:22:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:22:40,179 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 13 states. [2018-10-26 22:22:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:40,286 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-26 22:22:40,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-26 22:22:40,287 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2018-10-26 22:22:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:40,288 INFO L225 Difference]: With dead ends: 72 [2018-10-26 22:22:40,288 INFO L226 Difference]: Without dead ends: 66 [2018-10-26 22:22:40,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-26 22:22:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-26 22:22:40,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2018-10-26 22:22:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-26 22:22:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-26 22:22:40,296 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 57 [2018-10-26 22:22:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:40,297 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-26 22:22:40,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-26 22:22:40,297 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-26 22:22:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-26 22:22:40,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:40,298 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:40,299 INFO L424 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:40,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:40,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1082831787, now seen corresponding path program 10 times [2018-10-26 22:22:40,299 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:40,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:40,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:40,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:40,630 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:40,630 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 [2018-10-26 22:22:40,640 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:40,707 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:40,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:40,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:40,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:40,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-10-26 22:22:40,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-26 22:22:40,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-26 22:22:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:22:40,771 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 14 states. [2018-10-26 22:22:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:40,920 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-26 22:22:40,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-26 22:22:40,921 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2018-10-26 22:22:40,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:40,922 INFO L225 Difference]: With dead ends: 77 [2018-10-26 22:22:40,923 INFO L226 Difference]: Without dead ends: 71 [2018-10-26 22:22:40,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-26 22:22:40,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-26 22:22:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2018-10-26 22:22:40,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-26 22:22:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-26 22:22:40,929 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 62 [2018-10-26 22:22:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:40,930 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-26 22:22:40,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-26 22:22:40,930 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-26 22:22:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-26 22:22:40,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:40,931 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:40,931 INFO L424 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:40,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash 230007339, now seen corresponding path program 11 times [2018-10-26 22:22:40,932 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:40,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:40,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:40,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:41,180 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:41,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:41,181 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:41,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:41,274 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-26 22:22:41,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:41,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:41,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:41,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-10-26 22:22:41,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-26 22:22:41,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-26 22:22:41,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:22:41,330 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 15 states. [2018-10-26 22:22:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:41,462 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-26 22:22:41,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-26 22:22:41,463 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2018-10-26 22:22:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:41,465 INFO L225 Difference]: With dead ends: 82 [2018-10-26 22:22:41,465 INFO L226 Difference]: Without dead ends: 76 [2018-10-26 22:22:41,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-26 22:22:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-26 22:22:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2018-10-26 22:22:41,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-26 22:22:41,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-26 22:22:41,471 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 67 [2018-10-26 22:22:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:41,476 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-26 22:22:41,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-26 22:22:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-26 22:22:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-26 22:22:41,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:41,477 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:41,478 INFO L424 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:41,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash 546275861, now seen corresponding path program 12 times [2018-10-26 22:22:41,478 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:41,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:41,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:41,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:41,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:41,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:41,862 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:41,870 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:22:42,066 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-26 22:22:42,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:42,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:42,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:42,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-10-26 22:22:42,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-26 22:22:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-26 22:22:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:22:42,132 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 16 states. [2018-10-26 22:22:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:42,318 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-26 22:22:42,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-26 22:22:42,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2018-10-26 22:22:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:42,320 INFO L225 Difference]: With dead ends: 87 [2018-10-26 22:22:42,320 INFO L226 Difference]: Without dead ends: 81 [2018-10-26 22:22:42,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-26 22:22:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-26 22:22:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2018-10-26 22:22:42,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-26 22:22:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-26 22:22:42,327 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 72 [2018-10-26 22:22:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:42,327 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-26 22:22:42,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-26 22:22:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-26 22:22:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-26 22:22:42,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:42,329 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:42,329 INFO L424 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:42,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:42,330 INFO L82 PathProgramCache]: Analyzing trace with hash 89588843, now seen corresponding path program 13 times [2018-10-26 22:22:42,330 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:42,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:42,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:42,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:42,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:42,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:42,621 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:42,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:42,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:42,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:42,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-10-26 22:22:42,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-26 22:22:42,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-26 22:22:42,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:22:42,731 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 17 states. [2018-10-26 22:22:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:43,234 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-26 22:22:43,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-26 22:22:43,234 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2018-10-26 22:22:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:43,235 INFO L225 Difference]: With dead ends: 92 [2018-10-26 22:22:43,235 INFO L226 Difference]: Without dead ends: 86 [2018-10-26 22:22:43,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-26 22:22:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-26 22:22:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2018-10-26 22:22:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-26 22:22:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-26 22:22:43,240 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 77 [2018-10-26 22:22:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:43,241 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-26 22:22:43,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-26 22:22:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-26 22:22:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-26 22:22:43,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:43,243 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:43,243 INFO L424 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:43,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:43,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1840351189, now seen corresponding path program 14 times [2018-10-26 22:22:43,243 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:43,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:43,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:43,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:43,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:43,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:43,569 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:43,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:43,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:43,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:43,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:43,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:43,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-10-26 22:22:43,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-26 22:22:43,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-26 22:22:43,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:22:43,670 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 18 states. [2018-10-26 22:22:43,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:43,794 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-26 22:22:43,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-26 22:22:43,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2018-10-26 22:22:43,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:43,795 INFO L225 Difference]: With dead ends: 97 [2018-10-26 22:22:43,795 INFO L226 Difference]: Without dead ends: 91 [2018-10-26 22:22:43,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-26 22:22:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-26 22:22:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2018-10-26 22:22:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-26 22:22:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-26 22:22:43,800 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 82 [2018-10-26 22:22:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:43,800 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-26 22:22:43,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-26 22:22:43,801 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-26 22:22:43,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-26 22:22:43,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:43,802 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:43,802 INFO L424 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:43,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:43,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1834129067, now seen corresponding path program 15 times [2018-10-26 22:22:43,803 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:43,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:43,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:43,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:43,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:44,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:44,644 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:44,651 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:44,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-26 22:22:44,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:44,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:44,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:44,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-10-26 22:22:44,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-26 22:22:44,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-26 22:22:44,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:22:44,985 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 19 states. [2018-10-26 22:22:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:45,233 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-26 22:22:45,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-26 22:22:45,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-10-26 22:22:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:45,235 INFO L225 Difference]: With dead ends: 102 [2018-10-26 22:22:45,235 INFO L226 Difference]: Without dead ends: 96 [2018-10-26 22:22:45,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-26 22:22:45,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-26 22:22:45,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2018-10-26 22:22:45,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-26 22:22:45,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-26 22:22:45,242 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 87 [2018-10-26 22:22:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:45,242 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-26 22:22:45,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-26 22:22:45,242 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-26 22:22:45,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-26 22:22:45,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:45,244 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:45,244 INFO L424 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:45,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1532452245, now seen corresponding path program 16 times [2018-10-26 22:22:45,244 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:45,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:45,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:45,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:45,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:45,652 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:45,652 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:45,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:45,740 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:45,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:45,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:45,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:45,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-10-26 22:22:45,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-26 22:22:45,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-26 22:22:45,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:22:45,790 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 20 states. [2018-10-26 22:22:45,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:45,939 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-26 22:22:45,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-26 22:22:45,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2018-10-26 22:22:45,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:45,941 INFO L225 Difference]: With dead ends: 107 [2018-10-26 22:22:45,941 INFO L226 Difference]: Without dead ends: 101 [2018-10-26 22:22:45,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-26 22:22:45,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-26 22:22:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2018-10-26 22:22:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-26 22:22:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-26 22:22:45,945 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 92 [2018-10-26 22:22:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:45,946 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-26 22:22:45,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-26 22:22:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-26 22:22:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-26 22:22:45,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:45,947 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:45,947 INFO L424 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:45,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash -22259477, now seen corresponding path program 17 times [2018-10-26 22:22:45,948 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:45,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:45,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:45,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:46,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:46,262 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:46,272 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:46,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-26 22:22:46,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:46,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:46,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:46,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-10-26 22:22:46,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-26 22:22:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-26 22:22:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:22:46,498 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 21 states. [2018-10-26 22:22:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:46,680 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-26 22:22:46,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-26 22:22:46,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2018-10-26 22:22:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:46,682 INFO L225 Difference]: With dead ends: 112 [2018-10-26 22:22:46,682 INFO L226 Difference]: Without dead ends: 106 [2018-10-26 22:22:46,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-26 22:22:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-26 22:22:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2018-10-26 22:22:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-26 22:22:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-26 22:22:46,687 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 97 [2018-10-26 22:22:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:46,687 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-26 22:22:46,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-26 22:22:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-26 22:22:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-26 22:22:46,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:46,688 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:46,688 INFO L424 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:46,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:46,689 INFO L82 PathProgramCache]: Analyzing trace with hash 855442261, now seen corresponding path program 18 times [2018-10-26 22:22:46,689 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:46,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:46,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:46,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:46,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:47,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:47,447 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:47,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:22:48,021 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-26 22:22:48,022 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:48,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:48,084 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:48,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-10-26 22:22:48,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-26 22:22:48,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-26 22:22:48,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:22:48,085 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 22 states. [2018-10-26 22:22:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:48,361 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-26 22:22:48,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-26 22:22:48,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2018-10-26 22:22:48,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:48,363 INFO L225 Difference]: With dead ends: 117 [2018-10-26 22:22:48,363 INFO L226 Difference]: Without dead ends: 111 [2018-10-26 22:22:48,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-26 22:22:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-26 22:22:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2018-10-26 22:22:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-26 22:22:48,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-26 22:22:48,368 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 102 [2018-10-26 22:22:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:48,369 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-26 22:22:48,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-26 22:22:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-26 22:22:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-26 22:22:48,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:48,369 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:48,370 INFO L424 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:48,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:48,370 INFO L82 PathProgramCache]: Analyzing trace with hash -43496661, now seen corresponding path program 19 times [2018-10-26 22:22:48,370 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:48,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:48,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:48,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:48,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:48,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:48,916 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:48,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:48,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:48,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:49,072 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:49,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-10-26 22:22:49,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-26 22:22:49,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-26 22:22:49,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:22:49,073 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 23 states. [2018-10-26 22:22:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:49,219 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-10-26 22:22:49,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-26 22:22:49,220 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2018-10-26 22:22:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:49,221 INFO L225 Difference]: With dead ends: 122 [2018-10-26 22:22:49,221 INFO L226 Difference]: Without dead ends: 116 [2018-10-26 22:22:49,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-26 22:22:49,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-26 22:22:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2018-10-26 22:22:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-26 22:22:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-26 22:22:49,227 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 107 [2018-10-26 22:22:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:49,227 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-26 22:22:49,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-26 22:22:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-26 22:22:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-26 22:22:49,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:49,228 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:49,229 INFO L424 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:49,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:49,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1826719467, now seen corresponding path program 20 times [2018-10-26 22:22:49,229 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:49,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:49,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:49,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:22:49,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:49,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:49,860 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:49,870 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:22:49,947 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:22:49,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:49,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:50,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:50,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-10-26 22:22:50,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-26 22:22:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-26 22:22:50,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:22:50,058 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 24 states. [2018-10-26 22:22:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:50,313 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-26 22:22:50,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-26 22:22:50,316 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2018-10-26 22:22:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:50,318 INFO L225 Difference]: With dead ends: 127 [2018-10-26 22:22:50,318 INFO L226 Difference]: Without dead ends: 121 [2018-10-26 22:22:50,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-26 22:22:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-26 22:22:50,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2018-10-26 22:22:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-10-26 22:22:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-10-26 22:22:50,322 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 112 [2018-10-26 22:22:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:50,322 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-10-26 22:22:50,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-26 22:22:50,322 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-10-26 22:22:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-26 22:22:50,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:50,323 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:50,323 INFO L424 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:50,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2022337899, now seen corresponding path program 21 times [2018-10-26 22:22:50,324 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:50,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:50,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:50,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:50,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:50,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:50,685 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:50,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:22:52,800 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-26 22:22:52,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:52,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:52,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:52,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:52,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-10-26 22:22:52,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-26 22:22:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-26 22:22:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:22:52,870 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 25 states. [2018-10-26 22:22:53,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:53,068 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-10-26 22:22:53,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-26 22:22:53,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2018-10-26 22:22:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:53,070 INFO L225 Difference]: With dead ends: 132 [2018-10-26 22:22:53,070 INFO L226 Difference]: Without dead ends: 126 [2018-10-26 22:22:53,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-26 22:22:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-26 22:22:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2018-10-26 22:22:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-26 22:22:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-26 22:22:53,075 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 117 [2018-10-26 22:22:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:53,075 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-26 22:22:53,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-26 22:22:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-26 22:22:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-26 22:22:53,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:53,076 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:53,076 INFO L424 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:53,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash 792182485, now seen corresponding path program 22 times [2018-10-26 22:22:53,077 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:53,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:53,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:53,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:53,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:53,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:53,882 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:53,890 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:22:53,994 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:22:53,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:53,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:54,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:54,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-10-26 22:22:54,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-26 22:22:54,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-26 22:22:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:22:54,060 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 26 states. [2018-10-26 22:22:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:54,293 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-26 22:22:54,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-26 22:22:54,294 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 122 [2018-10-26 22:22:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:54,295 INFO L225 Difference]: With dead ends: 137 [2018-10-26 22:22:54,295 INFO L226 Difference]: Without dead ends: 131 [2018-10-26 22:22:54,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-26 22:22:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-26 22:22:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2018-10-26 22:22:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-26 22:22:54,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-10-26 22:22:54,299 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 122 [2018-10-26 22:22:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:54,300 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-10-26 22:22:54,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-26 22:22:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-10-26 22:22:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-26 22:22:54,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:54,300 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:54,301 INFO L424 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:54,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:54,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1978220629, now seen corresponding path program 23 times [2018-10-26 22:22:54,301 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:54,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:54,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:54,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:54,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:55,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:55,047 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:55,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:22:55,446 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-26 22:22:55,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:22:55,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:22:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:55,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:22:55,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-10-26 22:22:55,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-26 22:22:55,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-26 22:22:55,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:22:55,513 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 27 states. [2018-10-26 22:22:55,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:22:55,690 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-10-26 22:22:55,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-26 22:22:55,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 127 [2018-10-26 22:22:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:22:55,693 INFO L225 Difference]: With dead ends: 142 [2018-10-26 22:22:55,693 INFO L226 Difference]: Without dead ends: 136 [2018-10-26 22:22:55,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-26 22:22:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-26 22:22:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2018-10-26 22:22:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-26 22:22:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-26 22:22:55,697 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 127 [2018-10-26 22:22:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:22:55,697 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-26 22:22:55,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-26 22:22:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-26 22:22:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-26 22:22:55,698 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:22:55,698 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:22:55,698 INFO L424 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:22:55,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:22:55,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1882925931, now seen corresponding path program 24 times [2018-10-26 22:22:55,699 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:22:55,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:22:55,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:55,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:22:55,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:22:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:22:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:22:56,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:22:56,583 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:22:56,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:23:01,100 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-26 22:23:01,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:01,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:01,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:01,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-10-26 22:23:01,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-26 22:23:01,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-26 22:23:01,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:23:01,199 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 28 states. [2018-10-26 22:23:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:01,515 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-26 22:23:01,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-26 22:23:01,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 132 [2018-10-26 22:23:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:01,517 INFO L225 Difference]: With dead ends: 147 [2018-10-26 22:23:01,517 INFO L226 Difference]: Without dead ends: 141 [2018-10-26 22:23:01,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-26 22:23:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-26 22:23:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2018-10-26 22:23:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-10-26 22:23:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-10-26 22:23:01,522 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 132 [2018-10-26 22:23:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:01,523 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-10-26 22:23:01,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-26 22:23:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-10-26 22:23:01,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-26 22:23:01,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:01,524 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:01,525 INFO L424 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:01,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1760476693, now seen corresponding path program 25 times [2018-10-26 22:23:01,525 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:01,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:01,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:01,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:01,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:03,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:03,780 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:03,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:03,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:03,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:03,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-10-26 22:23:03,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-26 22:23:03,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-26 22:23:03,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:23:03,931 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 29 states. [2018-10-26 22:23:04,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:04,086 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-10-26 22:23:04,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-26 22:23:04,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2018-10-26 22:23:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:04,089 INFO L225 Difference]: With dead ends: 152 [2018-10-26 22:23:04,089 INFO L226 Difference]: Without dead ends: 146 [2018-10-26 22:23:04,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-26 22:23:04,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-26 22:23:04,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2018-10-26 22:23:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-26 22:23:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-26 22:23:04,094 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 137 [2018-10-26 22:23:04,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:04,095 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-26 22:23:04,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-26 22:23:04,095 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-26 22:23:04,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-26 22:23:04,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:04,096 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:04,096 INFO L424 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:04,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:04,096 INFO L82 PathProgramCache]: Analyzing trace with hash -767444395, now seen corresponding path program 26 times [2018-10-26 22:23:04,097 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:04,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:04,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:04,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:04,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:05,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:05,260 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:05,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:23:05,360 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:23:05,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:05,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:05,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:05,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-10-26 22:23:05,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-26 22:23:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-26 22:23:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:23:05,439 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 30 states. [2018-10-26 22:23:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:05,912 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-26 22:23:05,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-26 22:23:05,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2018-10-26 22:23:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:05,914 INFO L225 Difference]: With dead ends: 157 [2018-10-26 22:23:05,914 INFO L226 Difference]: Without dead ends: 151 [2018-10-26 22:23:05,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-26 22:23:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-26 22:23:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2018-10-26 22:23:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-26 22:23:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-10-26 22:23:05,918 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 142 [2018-10-26 22:23:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:05,919 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-10-26 22:23:05,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-26 22:23:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-10-26 22:23:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-26 22:23:05,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:05,920 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:05,920 INFO L424 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:05,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:05,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1887570901, now seen corresponding path program 27 times [2018-10-26 22:23:05,920 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:05,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:05,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:05,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:05,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:07,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:07,563 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:07,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:23:14,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-26 22:23:14,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:14,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:14,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:14,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:14,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-10-26 22:23:14,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-26 22:23:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-26 22:23:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:23:14,941 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 31 states. [2018-10-26 22:23:15,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:15,147 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-10-26 22:23:15,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-26 22:23:15,148 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2018-10-26 22:23:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:15,149 INFO L225 Difference]: With dead ends: 162 [2018-10-26 22:23:15,149 INFO L226 Difference]: Without dead ends: 156 [2018-10-26 22:23:15,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-26 22:23:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-26 22:23:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2018-10-26 22:23:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-26 22:23:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-26 22:23:15,154 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 147 [2018-10-26 22:23:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:15,154 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-26 22:23:15,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-26 22:23:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-26 22:23:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-26 22:23:15,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:15,156 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:15,156 INFO L424 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:15,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1764388885, now seen corresponding path program 28 times [2018-10-26 22:23:15,156 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:15,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:15,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:15,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:15,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:15,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:15,671 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:15,678 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:23:15,823 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:23:15,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:15,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:15,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:15,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-10-26 22:23:15,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-26 22:23:15,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-26 22:23:15,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:23:15,888 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 32 states. [2018-10-26 22:23:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:16,093 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-26 22:23:16,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-26 22:23:16,093 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 152 [2018-10-26 22:23:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:16,095 INFO L225 Difference]: With dead ends: 167 [2018-10-26 22:23:16,095 INFO L226 Difference]: Without dead ends: 161 [2018-10-26 22:23:16,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-26 22:23:16,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-26 22:23:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2018-10-26 22:23:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-10-26 22:23:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-10-26 22:23:16,101 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 152 [2018-10-26 22:23:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:16,101 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-10-26 22:23:16,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-26 22:23:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-10-26 22:23:16,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-26 22:23:16,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:16,102 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:16,102 INFO L424 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:16,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:16,103 INFO L82 PathProgramCache]: Analyzing trace with hash 778098283, now seen corresponding path program 29 times [2018-10-26 22:23:16,103 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:16,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:16,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:16,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:16,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:16,806 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:16,807 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:16,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:23:20,874 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-26 22:23:20,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:20,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:21,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:21,054 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:21,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-10-26 22:23:21,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-26 22:23:21,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-26 22:23:21,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:23:21,056 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 33 states. [2018-10-26 22:23:22,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:22,125 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-10-26 22:23:22,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-26 22:23:22,126 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2018-10-26 22:23:22,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:22,128 INFO L225 Difference]: With dead ends: 172 [2018-10-26 22:23:22,128 INFO L226 Difference]: Without dead ends: 166 [2018-10-26 22:23:22,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-26 22:23:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-26 22:23:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2018-10-26 22:23:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-26 22:23:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-26 22:23:22,133 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 157 [2018-10-26 22:23:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:22,134 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-26 22:23:22,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-26 22:23:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-26 22:23:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-26 22:23:22,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:22,135 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:22,135 INFO L424 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:22,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash -604310059, now seen corresponding path program 30 times [2018-10-26 22:23:22,136 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:22,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:22,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:22,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:23,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:23,267 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:23,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:23:52,691 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-26 22:23:52,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:52,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:52,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:52,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-10-26 22:23:52,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-26 22:23:52,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-26 22:23:52,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:23:52,796 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 34 states. [2018-10-26 22:23:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:53,127 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-26 22:23:53,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-26 22:23:53,127 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2018-10-26 22:23:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:53,129 INFO L225 Difference]: With dead ends: 177 [2018-10-26 22:23:53,129 INFO L226 Difference]: Without dead ends: 171 [2018-10-26 22:23:53,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-26 22:23:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-26 22:23:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2018-10-26 22:23:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-26 22:23:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-10-26 22:23:53,134 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 162 [2018-10-26 22:23:53,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:53,134 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-10-26 22:23:53,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-26 22:23:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-10-26 22:23:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-26 22:23:53,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:53,136 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:53,136 INFO L424 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:53,136 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 968747179, now seen corresponding path program 31 times [2018-10-26 22:23:53,136 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:53,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:53,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:53,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:53,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:54,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:54,109 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:54,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:54,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:54,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:54,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-10-26 22:23:54,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-26 22:23:54,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-26 22:23:54,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:23:54,280 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 35 states. [2018-10-26 22:23:55,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:55,325 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2018-10-26 22:23:55,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-26 22:23:55,326 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2018-10-26 22:23:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:55,327 INFO L225 Difference]: With dead ends: 182 [2018-10-26 22:23:55,328 INFO L226 Difference]: Without dead ends: 176 [2018-10-26 22:23:55,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-26 22:23:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-26 22:23:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 173. [2018-10-26 22:23:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-26 22:23:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-26 22:23:55,334 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 167 [2018-10-26 22:23:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:55,335 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-26 22:23:55,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-26 22:23:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-26 22:23:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-26 22:23:55,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:55,336 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:55,337 INFO L424 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:55,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2026943595, now seen corresponding path program 32 times [2018-10-26 22:23:55,338 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:55,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:55,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:55,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:23:55,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:56,730 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:56,731 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:56,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:23:56,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:23:56,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:23:56,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:23:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:56,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:23:56,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-10-26 22:23:56,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-26 22:23:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-26 22:23:56,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:23:56,981 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 36 states. [2018-10-26 22:23:57,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:23:57,235 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-26 22:23:57,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-26 22:23:57,235 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 172 [2018-10-26 22:23:57,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:23:57,238 INFO L225 Difference]: With dead ends: 187 [2018-10-26 22:23:57,238 INFO L226 Difference]: Without dead ends: 181 [2018-10-26 22:23:57,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-26 22:23:57,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-26 22:23:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2018-10-26 22:23:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-26 22:23:57,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-10-26 22:23:57,244 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 172 [2018-10-26 22:23:57,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:23:57,244 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-10-26 22:23:57,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-26 22:23:57,245 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-10-26 22:23:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-26 22:23:57,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:23:57,246 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:23:57,246 INFO L424 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:23:57,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:23:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1030149397, now seen corresponding path program 33 times [2018-10-26 22:23:57,247 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:23:57,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:23:57,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:57,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:23:57,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:23:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:23:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:23:58,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:23:58,190 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:23:58,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:24:07,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-26 22:24:07,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:07,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:07,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:07,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-10-26 22:24:07,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-26 22:24:07,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-26 22:24:07,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:24:07,673 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 37 states. [2018-10-26 22:24:07,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:07,968 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2018-10-26 22:24:07,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-26 22:24:07,968 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 177 [2018-10-26 22:24:07,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:07,970 INFO L225 Difference]: With dead ends: 192 [2018-10-26 22:24:07,971 INFO L226 Difference]: Without dead ends: 186 [2018-10-26 22:24:07,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-26 22:24:07,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-26 22:24:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2018-10-26 22:24:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-26 22:24:07,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-26 22:24:07,975 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 177 [2018-10-26 22:24:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:07,975 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-26 22:24:07,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-26 22:24:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-26 22:24:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-26 22:24:07,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:07,976 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:07,976 INFO L424 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:07,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1547923797, now seen corresponding path program 34 times [2018-10-26 22:24:07,977 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:07,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:07,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:07,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:07,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:09,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:09,415 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:24:09,423 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:24:09,618 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:24:09,618 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:09,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:09,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:09,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-10-26 22:24:09,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-26 22:24:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-26 22:24:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:24:09,787 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 38 states. [2018-10-26 22:24:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:10,057 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-26 22:24:10,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-26 22:24:10,058 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 182 [2018-10-26 22:24:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:10,059 INFO L225 Difference]: With dead ends: 197 [2018-10-26 22:24:10,059 INFO L226 Difference]: Without dead ends: 191 [2018-10-26 22:24:10,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-26 22:24:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-26 22:24:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2018-10-26 22:24:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-10-26 22:24:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-10-26 22:24:10,065 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 182 [2018-10-26 22:24:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:10,065 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-10-26 22:24:10,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-26 22:24:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-10-26 22:24:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-26 22:24:10,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:10,066 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:10,067 INFO L424 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:10,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1693883691, now seen corresponding path program 35 times [2018-10-26 22:24:10,067 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:10,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:10,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:10,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:10,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:10,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:10,773 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:24:10,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:24:13,358 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-26 22:24:13,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:24:13,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:24:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:13,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:24:13,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-10-26 22:24:13,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-26 22:24:13,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-26 22:24:13,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:24:13,543 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 39 states. [2018-10-26 22:24:13,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:24:13,932 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2018-10-26 22:24:13,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-26 22:24:13,932 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 187 [2018-10-26 22:24:13,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:24:13,934 INFO L225 Difference]: With dead ends: 202 [2018-10-26 22:24:13,934 INFO L226 Difference]: Without dead ends: 196 [2018-10-26 22:24:13,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-26 22:24:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-26 22:24:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2018-10-26 22:24:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-26 22:24:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-26 22:24:13,938 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 187 [2018-10-26 22:24:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:24:13,939 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-26 22:24:13,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-26 22:24:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-26 22:24:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-26 22:24:13,940 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:24:13,940 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:24:13,940 INFO L424 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:24:13,941 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:24:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1582078187, now seen corresponding path program 36 times [2018-10-26 22:24:13,941 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:24:13,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:24:13,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:13,942 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:24:13,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:24:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:24:14,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:24:14,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:24:14,692 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:24:14,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-26 22:25:26,003 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-26 22:25:26,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:25:26,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:25:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:26,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:25:26,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-10-26 22:25:26,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-26 22:25:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-26 22:25:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:25:26,124 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 40 states. [2018-10-26 22:25:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:25:27,346 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-26 22:25:27,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-26 22:25:27,346 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 192 [2018-10-26 22:25:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:25:27,348 INFO L225 Difference]: With dead ends: 207 [2018-10-26 22:25:27,348 INFO L226 Difference]: Without dead ends: 201 [2018-10-26 22:25:27,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-26 22:25:27,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-26 22:25:27,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2018-10-26 22:25:27,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-10-26 22:25:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-10-26 22:25:27,353 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 192 [2018-10-26 22:25:27,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:25:27,353 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-10-26 22:25:27,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-26 22:25:27,353 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-10-26 22:25:27,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-26 22:25:27,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:25:27,355 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:25:27,355 INFO L424 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:25:27,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:25:27,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2015740053, now seen corresponding path program 37 times [2018-10-26 22:25:27,355 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:25:27,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:25:27,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:27,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:25:27,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:28,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:28,153 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:25:28,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:25:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:28,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:25:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:28,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:25:28,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-10-26 22:25:28,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-26 22:25:28,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-26 22:25:28,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:25:28,447 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 41 states. [2018-10-26 22:25:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:25:28,921 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2018-10-26 22:25:28,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-26 22:25:28,921 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 197 [2018-10-26 22:25:28,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:25:28,923 INFO L225 Difference]: With dead ends: 212 [2018-10-26 22:25:28,923 INFO L226 Difference]: Without dead ends: 206 [2018-10-26 22:25:28,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-26 22:25:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-26 22:25:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2018-10-26 22:25:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-26 22:25:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-26 22:25:28,927 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 197 [2018-10-26 22:25:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:25:28,927 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-26 22:25:28,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-26 22:25:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-26 22:25:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-26 22:25:28,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:25:28,929 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:25:28,929 INFO L424 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:25:28,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:25:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1292161835, now seen corresponding path program 38 times [2018-10-26 22:25:28,929 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:25:28,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:25:28,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:28,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-26 22:25:28,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:30,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:30,454 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:25:30,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-26 22:25:30,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-26 22:25:30,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:25:30,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:25:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:30,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:25:30,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-10-26 22:25:30,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-26 22:25:30,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-26 22:25:30,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:25:30,690 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 42 states. [2018-10-26 22:25:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:25:32,350 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-26 22:25:32,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-26 22:25:32,351 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 202 [2018-10-26 22:25:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:25:32,352 INFO L225 Difference]: With dead ends: 217 [2018-10-26 22:25:32,353 INFO L226 Difference]: Without dead ends: 211 [2018-10-26 22:25:32,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-26 22:25:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-26 22:25:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2018-10-26 22:25:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-26 22:25:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-10-26 22:25:32,358 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 202 [2018-10-26 22:25:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:25:32,358 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-10-26 22:25:32,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-26 22:25:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-10-26 22:25:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-26 22:25:32,359 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:25:32,359 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:25:32,360 INFO L424 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:25:32,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:25:32,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1656221269, now seen corresponding path program 39 times [2018-10-26 22:25:32,360 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:25:32,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:25:32,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:32,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:25:32,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:25:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:25:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:25:33,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:25:33,565 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:25:33,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-26 22:26:35,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-26 22:26:35,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:26:35,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:26:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:35,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:26:35,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-10-26 22:26:35,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-26 22:26:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-26 22:26:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:26:35,650 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 43 states. [2018-10-26 22:26:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:26:35,960 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2018-10-26 22:26:35,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-26 22:26:35,961 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 207 [2018-10-26 22:26:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:26:35,962 INFO L225 Difference]: With dead ends: 222 [2018-10-26 22:26:35,962 INFO L226 Difference]: Without dead ends: 216 [2018-10-26 22:26:35,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-26 22:26:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-26 22:26:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 213. [2018-10-26 22:26:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-26 22:26:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-10-26 22:26:35,968 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 207 [2018-10-26 22:26:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:26:35,968 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-10-26 22:26:35,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-26 22:26:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-10-26 22:26:35,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-26 22:26:35,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:26:35,970 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:26:35,970 INFO L424 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:26:35,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:26:35,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1063861611, now seen corresponding path program 40 times [2018-10-26 22:26:35,971 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:26:35,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:26:35,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:35,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:26:35,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:26:36,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:36,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:26:36,832 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:26:36,840 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-26 22:26:37,111 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-26 22:26:37,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:26:37,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:26:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:37,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:26:37,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-10-26 22:26:37,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-26 22:26:37,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-26 22:26:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:26:37,327 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 44 states. [2018-10-26 22:26:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:26:37,703 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-10-26 22:26:37,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-26 22:26:37,703 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2018-10-26 22:26:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:26:37,705 INFO L225 Difference]: With dead ends: 227 [2018-10-26 22:26:37,705 INFO L226 Difference]: Without dead ends: 221 [2018-10-26 22:26:37,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-26 22:26:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-26 22:26:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2018-10-26 22:26:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-10-26 22:26:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-10-26 22:26:37,710 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 212 [2018-10-26 22:26:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:26:37,710 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-10-26 22:26:37,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-26 22:26:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-10-26 22:26:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-26 22:26:37,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:26:37,711 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:26:37,711 INFO L424 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:26:37,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:26:37,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1648628715, now seen corresponding path program 41 times [2018-10-26 22:26:37,712 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:26:37,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:26:37,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:37,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:26:37,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:26:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:38,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:26:38,886 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:26:38,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-26 22:26:46,151 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-26 22:26:46,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-26 22:26:46,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-26 22:26:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:46,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-26 22:26:46,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-10-26 22:26:46,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-26 22:26:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-26 22:26:46,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:26:46,244 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 45 states. [2018-10-26 22:26:46,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-26 22:26:46,531 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2018-10-26 22:26:46,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-26 22:26:46,531 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 217 [2018-10-26 22:26:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-26 22:26:46,533 INFO L225 Difference]: With dead ends: 232 [2018-10-26 22:26:46,533 INFO L226 Difference]: Without dead ends: 226 [2018-10-26 22:26:46,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-26 22:26:46,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-26 22:26:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2018-10-26 22:26:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-26 22:26:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-26 22:26:46,538 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 217 [2018-10-26 22:26:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-26 22:26:46,538 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-26 22:26:46,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-26 22:26:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-26 22:26:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-26 22:26:46,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-26 22:26:46,539 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-26 22:26:46,539 INFO L424 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-26 22:26:46,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-26 22:26:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1878906795, now seen corresponding path program 42 times [2018-10-26 22:26:46,540 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-26 22:26:46,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-26 22:26:46,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:46,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-26 22:26:46,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-26 22:26:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-26 22:26:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-26 22:26:47,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-26 22:26:47,435 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-26 22:26:47,443 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown