java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:30:47,229 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:30:47,233 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:30:47,247 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:30:47,247 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:30:47,249 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:30:47,250 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:30:47,252 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:30:47,254 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:30:47,254 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:30:47,255 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:30:47,256 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:30:47,257 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:30:47,258 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:30:47,261 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:30:47,262 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:30:47,263 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:30:47,265 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:30:47,271 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:30:47,272 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:30:47,274 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:30:47,279 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:30:47,282 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-26 21:30:47,296 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:30:47,325 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:30:47,325 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:30:47,326 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:30:47,326 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:30:47,327 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:30:47,327 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:30:47,327 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:30:47,328 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:30:47,328 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:30:47,328 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:30:47,328 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:30:47,331 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:30:47,331 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:30:47,331 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:30:47,332 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:30:47,332 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:30:47,332 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:30:47,332 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:30:47,332 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:30:47,333 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:30:47,333 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:30:47,333 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:30:47,333 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:30:47,334 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:30:47,335 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:30:47,335 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:30:47,335 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:30:47,335 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:30:47,336 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:30:47,336 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:30:47,402 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:30:47,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:30:47,422 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:30:47,424 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:30:47,425 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:30:47,425 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-26 21:30:47,426 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-26 21:30:47,480 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:30:47,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:30:47,485 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:30:47,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:30:47,485 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:30:47,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,526 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:30:47,526 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:30:47,527 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:30:47,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:30:47,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:30:47,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:30:47,530 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:30:47,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,552 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... [2018-09-26 21:30:47,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:30:47,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:30:47,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:30:47,555 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:30:47,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:47,637 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:30:47,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:30:47,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:30:47,842 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:30:47,843 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:30:47 BoogieIcfgContainer [2018-09-26 21:30:47,843 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:30:47,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:30:47,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:30:47,847 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:30:47,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:30:47" (1/2) ... [2018-09-26 21:30:47,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef15009 and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:30:47, skipping insertion in model container [2018-09-26 21:30:47,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:30:47" (2/2) ... [2018-09-26 21:30:47,851 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-26 21:30:47,861 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:30:47,868 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:30:47,917 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:30:47,918 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:30:47,918 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:30:47,918 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:30:47,918 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:30:47,919 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:30:47,919 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:30:47,919 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:30:47,919 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:30:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-26 21:30:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:30:47,941 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:47,942 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:30:47,943 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:47,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-26 21:30:47,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:47,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:48,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,123 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:30:48,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:30:48,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:30:48,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:30:48,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:30:48,145 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-26 21:30:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:48,240 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-26 21:30:48,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:30:48,244 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:30:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:48,266 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:30:48,266 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:30:48,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-26 21:30:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:30:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-26 21:30:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:30:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-26 21:30:48,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-26 21:30:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:48,326 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-26 21:30:48,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:30:48,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-26 21:30:48,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:30:48,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:48,327 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:30:48,328 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:48,328 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:48,328 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-26 21:30:48,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:48,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:48,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:48,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:48,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:48,497 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:30:48,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:30:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:30:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:30:48,499 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-26 21:30:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:48,559 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-26 21:30:48,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:30:48,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-26 21:30:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:48,561 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:30:48,562 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:30:48,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:30:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:30:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-26 21:30:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:30:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-26 21:30:48,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-26 21:30:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:48,572 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-26 21:30:48,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:30:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-26 21:30:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:30:48,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:48,576 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-26 21:30:48,577 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:48,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:48,577 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-26 21:30:48,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:48,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:48,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:48,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:48,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:48,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-26 21:30:48,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:30:48,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:30:48,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:30:48,688 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-26 21:30:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:48,728 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-26 21:30:48,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:30:48,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-26 21:30:48,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:48,729 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:30:48,730 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:30:48,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:30:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:30:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-26 21:30:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:30:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-26 21:30:48,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-26 21:30:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:48,734 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-26 21:30:48,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:30:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-26 21:30:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:30:48,735 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:48,736 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-26 21:30:48,736 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:48,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:48,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-26 21:30:48,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:48,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:48,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:48,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:48,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:48,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:48,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:48,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:48,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:48,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:30:48,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:30:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:30:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:48,883 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-26 21:30:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:48,957 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-26 21:30:48,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:30:48,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:30:48,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:48,959 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:30:48,959 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:30:48,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:48,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:30:48,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-26 21:30:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:30:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-26 21:30:48,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-26 21:30:48,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:48,964 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-26 21:30:48,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:30:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-26 21:30:48,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:30:48,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:48,965 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:30:48,966 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:48,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:48,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-26 21:30:48,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:48,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:48,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:48,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:49,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:49,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:30:49,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:30:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:30:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:49,117 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-26 21:30:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:49,262 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-26 21:30:49,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:30:49,263 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:30:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:49,264 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:30:49,264 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:30:49,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:30:49,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-26 21:30:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:30:49,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-26 21:30:49,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-26 21:30:49,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:49,269 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-26 21:30:49,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:30:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-26 21:30:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:30:49,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:49,271 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-26 21:30:49,271 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:49,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-26 21:30:49,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:49,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:49,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:49,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:49,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:49,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:49,427 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:49,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:49,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:30:49,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:30:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:30:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:49,457 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-26 21:30:49,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:49,535 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-26 21:30:49,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:30:49,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:30:49,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:49,537 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:30:49,537 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:30:49,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:30:49,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-26 21:30:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:30:49,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:30:49,544 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-26 21:30:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:49,545 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:30:49,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:30:49,545 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:30:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:30:49,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:49,546 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-26 21:30:49,546 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:49,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-26 21:30:49,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:49,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:49,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:49,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:49,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:49,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:49,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:49,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:49,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-26 21:30:49,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:30:49,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:30:49,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:49,649 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-26 21:30:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:49,692 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-26 21:30:49,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:30:49,693 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-26 21:30:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:49,694 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:30:49,695 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:30:49,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:30:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:30:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-26 21:30:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:30:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-26 21:30:49,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-26 21:30:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:49,700 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-26 21:30:49,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:30:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-26 21:30:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:49,701 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:49,701 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-26 21:30:49,701 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:49,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:49,702 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-26 21:30:49,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:49,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:49,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:49,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:49,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:49,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:49,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:30:49,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:49,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:49,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:49,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:49,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:49,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:49,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:49,917 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-26 21:30:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:49,982 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-26 21:30:49,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:49,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:49,983 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:30:49,983 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:30:49,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:30:49,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-26 21:30:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:30:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:30:49,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-26 21:30:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:49,990 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:30:49,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:49,991 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:30:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:49,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:49,991 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:30:49,992 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:49,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-26 21:30:49,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:49,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:49,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:50,066 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:50,073 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:30:50,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:50,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:50,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:50,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:50,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:50,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,103 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-26 21:30:50,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:50,169 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-26 21:30:50,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:50,169 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:50,170 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:30:50,170 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:30:50,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:30:50,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-26 21:30:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:30:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:30:50,175 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-26 21:30:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:50,175 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:30:50,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:30:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:50,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:50,176 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:30:50,177 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:50,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-26 21:30:50,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:50,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:50,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:50,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:50,245 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:50,270 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:50,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:50,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:50,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:50,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,299 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-26 21:30:50,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:50,336 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-26 21:30:50,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:50,336 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:50,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:50,337 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:30:50,337 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:30:50,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:30:50,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-26 21:30:50,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:30:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:30:50,343 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-26 21:30:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:50,344 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:30:50,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:30:50,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:50,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:50,345 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:30:50,345 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:50,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-26 21:30:50,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:50,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:50,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:50,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:50,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:50,499 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:30:50,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:50,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:50,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:50,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:50,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:50,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,551 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-26 21:30:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:50,754 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-26 21:30:50,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:50,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:50,755 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:30:50,755 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:30:50,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:30:50,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-26 21:30:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:30:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:30:50,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-26 21:30:50,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:50,760 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:30:50,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:50,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:30:50,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:50,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:50,761 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:30:50,761 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:50,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-26 21:30:50,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:50,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:50,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:50,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,823 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:50,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:50,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:30:50,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:50,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:50,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:50,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:50,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:50,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,868 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-26 21:30:50,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:50,894 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:30:50,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:50,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:50,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:50,895 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:30:50,895 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:30:50,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:30:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-26 21:30:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:30:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:30:50,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-26 21:30:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:50,903 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:30:50,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:30:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:50,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:50,903 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:30:50,904 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:50,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-26 21:30:50,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:50,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:50,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:50,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:50,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:50,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:50,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:51,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:51,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:51,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:51,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:51,029 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-26 21:30:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:51,060 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:30:51,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:51,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:51,061 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:30:51,061 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:30:51,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:30:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-26 21:30:51,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:30:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:30:51,067 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-26 21:30:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:51,067 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:30:51,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:30:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:51,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:51,068 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-26 21:30:51,068 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:51,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-26 21:30:51,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:51,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:51,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:51,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:51,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:51,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:51,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:51,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:51,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:51,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:51,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:51,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:51,166 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-26 21:30:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:51,210 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-26 21:30:51,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:51,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:51,211 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:30:51,212 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:30:51,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:51,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:30:51,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-26 21:30:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:30:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:30:51,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-26 21:30:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:51,218 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:30:51,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:30:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:30:51,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:51,219 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-26 21:30:51,220 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:51,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:51,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-26 21:30:51,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:51,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:51,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:51,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:51,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:51,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:51,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-26 21:30:51,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:51,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:51,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:30:51,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:30:51,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:30:51,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:51,504 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-26 21:30:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:51,568 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-26 21:30:51,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:30:51,569 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-26 21:30:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:51,570 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:30:51,570 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:30:51,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:30:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:30:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-26 21:30:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:30:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-26 21:30:51,576 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-26 21:30:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:51,576 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-26 21:30:51,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:30:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-26 21:30:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:51,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:51,577 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-26 21:30:51,577 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:51,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:51,578 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-26 21:30:51,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:51,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:51,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:51,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:51,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:51,714 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:51,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:51,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:51,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:51,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:51,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:51,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:51,775 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-26 21:30:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:51,874 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:30:51,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:51,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:51,875 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:30:51,875 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:30:51,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:30:51,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-26 21:30:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:51,883 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:30:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:51,883 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:51,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:51,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:51,884 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:51,884 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:51,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:51,885 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-26 21:30:51,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:51,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:51,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:51,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:51,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:51,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:51,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:51,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:30:51,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:51,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:52,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:52,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:52,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:52,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:52,008 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:30:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:52,061 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:30:52,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:52,061 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:52,061 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:30:52,062 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:30:52,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:30:52,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-26 21:30:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:30:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:30:52,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-26 21:30:52,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:52,068 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:30:52,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:52,068 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:30:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:52,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:52,069 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:52,069 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:52,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:52,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-26 21:30:52,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:52,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:52,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:52,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:52,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:52,155 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:52,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:52,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:52,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:52,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:52,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:52,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:52,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:52,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:52,200 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-26 21:30:52,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:52,288 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:30:52,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:52,288 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:52,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:52,289 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:30:52,289 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:30:52,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:30:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-26 21:30:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:52,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:52,299 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:30:52,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:52,300 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:52,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:52,300 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:52,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:52,301 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:30:52,301 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:52,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-26 21:30:52,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:52,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:52,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:52,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:52,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:52,418 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:52,426 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-26 21:30:52,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:52,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:52,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:52,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:52,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:52,466 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:30:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:52,691 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-26 21:30:52,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:52,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:52,692 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:30:52,692 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:30:52,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:30:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-26 21:30:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:30:52,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:30:52,699 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-26 21:30:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:52,699 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:30:52,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:52,700 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:30:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:52,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:52,700 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:52,701 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:52,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-26 21:30:52,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:52,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:52,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:52,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:52,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:52,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:52,944 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:30:52,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:52,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:52,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:52,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:52,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:52,971 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-26 21:30:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:53,042 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:30:53,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:53,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:53,043 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:30:53,043 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:30:53,044 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:30:53,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-26 21:30:53,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:53,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:53,051 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:30:53,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:53,051 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:53,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:53,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:53,052 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:53,052 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:30:53,052 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:53,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-26 21:30:53,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:53,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:53,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:53,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:53,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:53,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:53,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:53,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:53,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:53,207 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:30:53,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:53,377 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:30:53,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:53,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:53,378 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:30:53,378 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:30:53,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:30:53,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-26 21:30:53,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:30:53,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:30:53,387 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-26 21:30:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:53,387 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:30:53,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:53,387 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:30:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:53,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:53,388 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:30:53,388 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:53,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:53,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-26 21:30:53,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:53,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:53,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:53,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:53,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:53,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:53,529 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:53,530 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:53,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:53,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,556 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:53,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:53,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:53,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:53,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:53,557 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-26 21:30:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:53,608 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-26 21:30:53,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:53,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:53,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:53,608 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:30:53,609 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:30:53,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:53,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:30:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-26 21:30:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:53,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:30:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:53,616 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:53,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:53,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:53,617 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:53,617 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:53,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:53,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-26 21:30:53,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:53,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:53,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:53,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:53,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:53,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:53,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:53,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:30:53,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:53,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:53,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:53,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:53,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:53,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:53,739 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:30:54,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,014 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-26 21:30:54,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:54,014 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:54,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,015 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:30:54,015 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:30:54,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:30:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-26 21:30:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:30:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:30:54,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-26 21:30:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:54,023 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:30:54,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:30:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:54,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:54,024 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:54,024 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:54,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:54,024 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-26 21:30:54,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:54,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:54,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:54,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-26 21:30:54,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:54,409 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:54,409 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:54,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:54,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:54,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:54,441 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-26 21:30:54,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,501 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:30:54,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:54,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:54,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,501 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:30:54,501 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:30:54,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:54,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:30:54,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:30:54,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:54,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:54,512 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:30:54,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:54,512 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:54,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:54,512 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:54,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:54,513 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:30:54,513 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:54,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:54,513 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-26 21:30:54,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:54,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:54,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:54,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:54,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:54,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:54,585 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:54,598 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-26 21:30:54,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:54,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:54,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:54,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:54,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:54,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:54,625 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:30:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,761 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:30:54,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:54,761 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:54,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,762 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:30:54,762 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:30:54,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:30:54,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-26 21:30:54,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:54,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:54,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:30:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:54,772 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:54,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:54,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:54,773 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:30:54,773 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:54,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:54,774 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-26 21:30:54,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:54,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:54,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:54,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:54,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:54,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:54,885 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:30:54,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:54,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:54,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:54,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:54,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:54,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:54,911 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:30:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:54,988 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:30:54,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:54,988 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:54,989 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:30:54,989 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:30:54,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:30:55,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:30:55,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:55,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:30:55,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:55,002 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:55,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:55,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:55,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:55,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:55,002 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:55,003 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:55,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:55,003 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-26 21:30:55,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:55,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:55,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:55,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,069 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:55,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:55,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:55,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:55,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:55,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,119 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:30:55,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:55,190 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:30:55,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:55,190 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:55,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:55,190 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:30:55,191 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:30:55,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:30:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-26 21:30:55,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:30:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:30:55,197 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-26 21:30:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:55,198 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:30:55,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:30:55,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:55,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:55,198 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-26 21:30:55,199 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:55,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-26 21:30:55,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:55,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:55,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,200 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:55,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:55,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:55,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:55,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:55,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:55,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:55,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:55,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:55,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,355 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-26 21:30:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:55,389 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:30:55,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:55,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:55,390 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:30:55,391 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:30:55,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:30:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-26 21:30:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:55,403 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:30:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:55,403 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:55,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:55,404 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:55,404 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:55,404 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:55,404 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-26 21:30:55,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:55,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:55,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:55,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:55,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:55,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-26 21:30:55,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:55,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:55,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:55,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:55,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,508 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:30:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:55,581 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:30:55,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:55,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:55,582 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:30:55,582 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:30:55,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:30:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-26 21:30:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:55,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:55,592 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-26 21:30:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:55,593 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:55,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:55,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:55,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:55,594 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-26 21:30:55,594 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:55,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-26 21:30:55,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:55,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:55,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:55,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:55,694 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:55,699 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:55,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:55,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:55,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:55,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:55,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:55,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,733 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-26 21:30:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:55,805 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-26 21:30:55,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:55,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:55,805 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:30:55,805 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:30:55,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:30:55,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-26 21:30:55,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:55,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-26 21:30:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:55,814 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:55,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:30:55,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:55,815 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-26 21:30:55,815 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:55,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-26 21:30:55,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:55,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:55,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:55,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:55,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:55,895 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:55,925 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:55,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:55,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:55,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:55,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-26 21:30:55,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:30:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:30:55,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,956 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-26 21:30:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:55,988 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-26 21:30:55,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:30:55,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-26 21:30:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:55,990 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:30:55,990 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:30:55,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:30:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:30:55,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-26 21:30:55,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:30:55,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-26 21:30:55,998 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-26 21:30:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:55,998 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-26 21:30:55,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:30:55,999 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-26 21:30:55,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:55,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:55,999 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-26 21:30:56,000 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:56,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:56,000 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-26 21:30:56,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:56,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:56,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:56,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:56,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:56,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:56,083 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:56,157 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:30:56,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:56,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:56,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:56,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:56,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:56,198 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-26 21:30:56,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:56,395 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:30:56,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:56,395 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:56,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:56,395 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:30:56,395 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:30:56,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:30:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:30:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:56,407 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:56,408 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:56,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:56,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:56,408 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:30:56,408 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:56,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-26 21:30:56,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:56,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:56,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:56,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:56,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:56,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:56,479 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:30:56,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:56,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:56,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:56,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:56,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:56,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:56,506 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:56,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:56,561 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:30:56,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:56,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:56,562 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:30:56,562 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:30:56,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:30:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:30:56,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:56,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:56,576 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:30:56,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:56,576 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:56,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:56,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:56,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:56,577 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:30:56,577 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:56,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-26 21:30:56,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:56,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:56,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:56,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:56,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:56,709 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:56,716 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:30:56,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:56,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:56,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:56,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:56,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:56,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:56,747 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:30:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:56,822 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:30:56,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:56,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:56,822 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:30:56,822 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:30:56,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:30:56,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:30:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:56,834 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:56,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:56,834 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:56,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:56,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:56,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:56,835 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:56,835 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:56,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:56,835 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-26 21:30:56,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:56,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:56,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:56,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:56,950 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:56,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:56,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:56,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:57,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,002 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:57,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:57,080 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:30:57,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:57,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:57,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:57,081 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:30:57,081 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:30:57,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:30:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-26 21:30:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:57,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-26 21:30:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:57,092 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:57,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:57,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:57,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:57,092 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:30:57,092 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:57,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:57,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-26 21:30:57,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:57,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:57,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:57,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:57,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:57,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:57,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:57,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:57,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:57,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:57,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:57,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,221 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-26 21:30:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:57,273 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:30:57,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:57,273 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:57,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:57,274 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:30:57,274 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:30:57,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:30:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-26 21:30:57,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:57,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:57,284 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:57,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:57,285 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:57,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:57,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:57,285 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:57,286 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:57,286 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:57,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-26 21:30:57,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:57,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:57,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,287 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:57,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:57,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:57,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:57,369 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:30:57,369 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:57,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:57,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:57,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:57,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,394 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:57,435 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:30:57,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:57,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:57,435 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:30:57,435 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:30:57,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:30:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-26 21:30:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:57,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:30:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:57,449 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:57,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:57,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:57,450 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:57,450 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:57,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:57,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-26 21:30:57,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:57,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:57,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:57,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:57,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:57,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:57,527 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:57,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:57,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:57,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:57,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,552 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:30:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:57,640 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:30:57,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:57,640 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:57,640 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:30:57,641 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:30:57,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:30:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-26 21:30:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:57,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:57,656 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:57,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:57,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:57,656 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:57,657 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:57,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-26 21:30:57,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:57,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:57,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:57,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:57,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:57,708 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:57,713 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:30:57,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:57,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:57,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:57,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,743 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:57,781 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-26 21:30:57,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:57,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:57,782 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:30:57,782 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:30:57,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:30:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-26 21:30:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:30:57,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:30:57,793 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-26 21:30:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:57,793 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:30:57,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:57,793 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:30:57,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:57,793 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:57,793 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:30:57,793 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:57,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:57,794 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-26 21:30:57,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:57,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:57,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:57,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:57,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:57,939 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:57,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:30:57,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:57,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:57,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:57,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:57,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:58,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,000 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-26 21:30:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:58,059 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:30:58,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:58,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:58,060 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:30:58,060 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:30:58,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:30:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:30:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:58,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:58,077 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:58,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:58,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:58,077 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:58,077 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:58,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:58,078 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-26 21:30:58,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:58,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:58,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:58,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,136 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:58,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:58,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:58,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:58,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:58,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:58,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:58,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,176 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:58,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:58,225 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:30:58,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:58,225 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:58,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:58,226 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:30:58,226 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:30:58,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:30:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-26 21:30:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:58,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:58,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:30:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:58,242 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:58,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:58,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:58,243 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:58,243 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:58,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:58,243 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-26 21:30:58,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:58,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:58,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:58,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:58,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:58,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:58,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:58,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:58,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:58,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:58,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:58,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:58,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,495 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:30:58,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:58,547 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:30:58,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:58,547 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:58,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:58,548 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:30:58,548 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:30:58,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:30:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:30:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:58,562 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:58,562 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:58,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:58,563 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:58,563 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:58,563 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:58,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:58,563 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-26 21:30:58,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:58,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:58,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:58,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:58,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-09-26 21:30:58,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:30:58,634 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:30:58,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:58,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:58,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:58,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:58,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:58,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,660 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:58,785 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:30:58,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:58,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:58,786 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:30:58,786 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:30:58,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:30:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-26 21:30:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:30:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:30:58,803 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-26 21:30:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:58,803 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:30:58,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:58,803 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:30:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:58,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:58,804 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:58,804 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:58,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:58,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-26 21:30:58,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:58,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:58,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:58,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:59,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:59,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:30:59,016 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:30:59,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:59,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:59,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,041 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-26 21:30:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:59,084 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:30:59,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:59,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:59,085 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:30:59,085 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:30:59,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:30:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-26 21:30:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:59,102 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:59,102 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:59,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:59,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:59,102 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:59,103 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:59,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-26 21:30:59,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:59,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:59,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:59,183 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:30:59,191 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:30:59,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:59,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:59,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,219 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:59,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:59,262 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:30:59,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:59,262 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:59,263 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:30:59,263 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:30:59,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:30:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-26 21:30:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:30:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:30:59,276 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:30:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:59,276 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:30:59,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:59,277 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:30:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:59,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:59,277 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:59,277 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:59,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-26 21:30:59,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:59,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:59,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:59,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:59,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:59,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:30:59,338 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:30:59,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:59,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:59,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:59,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,373 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:30:59,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:59,436 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-26 21:30:59,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:59,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:59,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:59,442 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:30:59,442 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:30:59,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:30:59,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-26 21:30:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:30:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:30:59,457 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:30:59,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:59,457 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:30:59,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:30:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:59,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:59,458 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:30:59,458 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:59,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:59,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-26 21:30:59,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:59,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:59,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:59,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,511 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:59,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:59,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:59,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:59,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:59,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,550 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:30:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:59,589 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-26 21:30:59,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:59,589 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:59,590 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:30:59,590 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:30:59,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:30:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-26 21:30:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:30:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:30:59,604 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-26 21:30:59,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:59,604 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:30:59,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:59,604 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:30:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:59,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:59,605 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:30:59,605 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:59,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-26 21:30:59,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:59,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:59,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:30:59,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:30:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:30:59,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:30:59,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:30:59,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:30:59,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:30:59,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:30:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:30:59,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:30:59,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:30:59,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:30:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:30:59,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,702 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-26 21:30:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:30:59,821 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:30:59,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:30:59,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:30:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:30:59,821 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:30:59,821 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:30:59,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:30:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:30:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-26 21:30:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:30:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:30:59,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:30:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:30:59,842 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:30:59,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:30:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:30:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:30:59,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:30:59,843 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:30:59,843 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:30:59,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:30:59,843 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-26 21:30:59,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:30:59,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:30:59,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:30:59,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:30:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:00,430 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:00,430 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:00,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:00,443 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:31:00,443 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:00,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:00,448 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:00,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:00,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:00,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:00,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:00,469 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:00,653 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:00,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:00,653 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:00,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:00,654 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:00,654 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:00,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-26 21:31:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:00,672 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:31:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:00,673 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:00,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:00,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:00,673 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:00,673 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:00,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:00,673 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-26 21:31:00,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:00,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:00,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:00,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:00,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:00,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:00,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:00,743 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:00,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:00,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:00,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:00,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:00,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:00,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:00,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:00,767 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:31:00,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:00,819 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:00,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:00,820 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:00,820 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:00,820 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:00,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-26 21:31:00,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:00,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:00,841 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:31:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:00,841 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:00,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:00,841 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:00,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:00,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:00,841 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:00,841 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:00,842 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-26 21:31:00,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:00,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:00,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:00,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:01,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:01,016 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:01,022 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:31:01,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:01,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:01,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:01,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:01,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,046 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:01,098 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:01,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:01,099 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:01,099 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:01,099 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:01,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-26 21:31:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:31:01,116 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:31:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:01,116 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:31:01,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:01,116 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:31:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:01,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:01,117 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:01,117 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:01,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:01,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-26 21:31:01,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:01,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:01,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:01,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:01,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:01,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:01,177 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:31:01,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:01,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:01,201 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:01,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,202 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:31:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:01,360 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:01,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:01,360 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:01,361 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:01,361 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:01,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-26 21:31:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:01,382 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:31:01,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:01,382 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:01,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:01,382 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:01,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:01,382 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:01,382 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:01,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-26 21:31:01,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:01,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:01,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:01,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:01,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:01,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:01,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:01,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:01,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:01,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:01,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,477 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:01,555 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:01,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:01,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:01,556 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:01,556 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:01,557 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-26 21:31:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:01,575 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:31:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:01,575 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:01,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:01,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:01,576 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:01,576 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:01,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:01,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-26 21:31:01,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:01,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:01,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:01,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:01,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:01,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:01,644 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:01,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:01,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:01,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:01,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:01,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:01,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,669 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:31:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:01,765 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:01,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:01,765 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:01,765 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:01,766 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:01,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-26 21:31:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:01,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:01,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:31:01,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:01,786 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:01,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:01,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:01,787 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:31:01,787 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:01,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-26 21:31:01,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:01,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:01,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:01,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:01,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:01,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:01,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:31:01,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:01,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:01,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:01,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:01,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:01,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:01,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:01,936 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:02,008 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:02,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:02,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:02,008 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:02,009 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:02,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:02,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-26 21:31:02,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:31:02,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:31:02,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-26 21:31:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:02,028 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:31:02,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:31:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:02,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:02,028 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:02,028 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:02,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:02,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-26 21:31:02,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:02,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:02,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:02,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:02,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:02,193 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:02,198 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:02,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:02,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:02,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:02,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:02,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:02,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,224 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-26 21:31:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:02,289 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:02,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:02,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:02,290 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:02,290 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:02,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:02,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:31:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:02,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:31:02,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:02,314 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:02,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:02,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:02,314 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:02,315 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:02,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:02,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-26 21:31:02,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:02,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:02,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:02,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:02,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:02,386 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:02,392 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:31:02,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:02,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:02,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:02,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:02,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:02,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,426 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:02,505 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:31:02,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:02,505 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:02,505 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:02,505 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:31:02,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:31:02,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-26 21:31:02,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:02,534 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:31:02,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:02,534 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:02,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:02,534 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:02,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:02,535 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:02,535 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:02,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-26 21:31:02,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:02,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:02,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:02,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,653 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:02,653 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:02,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:02,668 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-26 21:31:02,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:02,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:02,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:02,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:02,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:02,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,694 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:31:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:02,760 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:02,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:02,761 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:02,761 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:02,761 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:02,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:31:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:02,786 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:31:02,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:02,786 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:02,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:02,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:02,787 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:31:02,787 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:02,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-26 21:31:02,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:02,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:02,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:02,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:02,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:02,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:02,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:02,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:02,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:02,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:02,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:02,900 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:03,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,034 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:31:03,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:03,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:03,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,034 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:03,035 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:31:03,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:31:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-26 21:31:03,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:03,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:31:03,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-26 21:31:03,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,057 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:31:03,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:03,057 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:31:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:03,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,057 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-26 21:31:03,058 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-26 21:31:03,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:03,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:03,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:03,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:03,127 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:03,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:03,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:03,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:03,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,160 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-26 21:31:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,228 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:31:03,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:03,228 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,229 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:31:03,229 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:31:03,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:31:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-26 21:31:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:03,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:03,256 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:31:03,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,256 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:03,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:03,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:03,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:03,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,256 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:31:03,257 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,257 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-26 21:31:03,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:03,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:03,314 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:03,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:31:03,322 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:03,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:03,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:03,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:03,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:03,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,347 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,417 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:31:03,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:03,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,418 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:31:03,418 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:31:03,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:31:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-26 21:31:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:03,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:03,441 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-26 21:31:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,441 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:03,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:03,441 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:03,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,441 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-26 21:31:03,441 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,442 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-26 21:31:03,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:03,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:03,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:03,536 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:03,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:03,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:03,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:03,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,562 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-26 21:31:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,618 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-26 21:31:03,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:03,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,619 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:31:03,619 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:31:03,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:31:03,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-26 21:31:03,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:03,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-26 21:31:03,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,644 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:03,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:03,644 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:03,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:31:03,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,645 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-26 21:31:03,645 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-26 21:31:03,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:03,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:03,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:03,729 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-26 21:31:03,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:03,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:03,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:31:03,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:31:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:31:03,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,758 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-26 21:31:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:03,816 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-26 21:31:03,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:31:03,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-26 21:31:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:03,816 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:31:03,816 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:31:03,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:31:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:31:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-26 21:31:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:31:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-26 21:31:03,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-26 21:31:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:03,835 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-26 21:31:03,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:31:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-26 21:31:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:03,835 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:03,835 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-26 21:31:03,836 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:03,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:03,836 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-26 21:31:03,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:03,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:03,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:03,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:03,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:03,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:03,902 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:03,909 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:03,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:03,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:03,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:03,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:03,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:03,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:03,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:03,935 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-26 21:31:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:04,026 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:04,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:04,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:04,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:04,028 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:04,028 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:04,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:31:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:04,059 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:04,059 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:04,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:04,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:04,060 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:04,060 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:04,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-26 21:31:04,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:04,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:04,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:04,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:04,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:04,138 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:04,150 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:04,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:04,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:04,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:04,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:04,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:04,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:04,174 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:04,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:04,267 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:04,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:04,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:04,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:04,268 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:04,268 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:04,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:04,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:04,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:31:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:04,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:04,296 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:04,296 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:04,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:04,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:04,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:04,296 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:04,297 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:04,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-26 21:31:04,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:04,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:04,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:04,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:04,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:04,361 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:04,367 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:04,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:04,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:04,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:04,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:04,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:04,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:04,402 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:04,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:04,555 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:04,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:04,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:04,556 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:04,556 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:04,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:31:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:04,592 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:04,592 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:04,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:04,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:04,593 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:04,593 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:04,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:04,593 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-26 21:31:04,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:04,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:04,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,594 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:04,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,811 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:04,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:04,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:04,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:04,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:04,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:04,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:04,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:04,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:04,851 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:04,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:04,939 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:04,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:04,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:04,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:04,940 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:04,940 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:04,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-26 21:31:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:04,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:31:04,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:04,970 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:04,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:04,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:04,971 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:04,971 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:04,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-26 21:31:04,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:04,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:05,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:05,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:05,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:05,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:05,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:05,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:05,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:05,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:05,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:05,118 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:31:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:05,209 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:05,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:05,209 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:05,210 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:05,210 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:05,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:05,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:31:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:05,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:05,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:05,244 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:05,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:05,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:05,244 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:05,245 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:05,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:05,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-26 21:31:05,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:05,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:05,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:05,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:05,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,837 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:05,838 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:05,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:05,857 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:05,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:05,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:05,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:05,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:05,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:05,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:05,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:05,881 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:05,970 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:05,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:05,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:05,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:05,971 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:05,971 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:05,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:05,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:06,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:31:06,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:06,004 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:06,004 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:06,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:06,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:06,004 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:06,005 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:06,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-26 21:31:06,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:06,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:06,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:06,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:06,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:06,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:06,093 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:06,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:06,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,125 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:06,126 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:06,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,126 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:06,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:06,230 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:06,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:06,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:06,231 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:06,231 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:06,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:31:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:06,264 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:06,264 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:06,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:06,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:06,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:06,265 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:06,265 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:06,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:06,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-26 21:31:06,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:06,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:06,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:06,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:06,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:06,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:06,342 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:06,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:06,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:06,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:06,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,366 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:06,447 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:06,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:06,447 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:06,447 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:06,447 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:06,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:06,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-26 21:31:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:31:06,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-26 21:31:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:06,475 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:31:06,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:31:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:06,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:06,476 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:06,476 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:06,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:06,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-26 21:31:06,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:06,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:06,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:06,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:06,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:06,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:06,548 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:06,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:06,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:06,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:06,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:06,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:06,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,576 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-26 21:31:06,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:06,670 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:06,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:06,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:06,671 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:06,671 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:06,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:06,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:31:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:06,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:06,707 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:06,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:06,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:06,708 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:06,708 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:06,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-26 21:31:06,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:06,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:06,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:06,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:06,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:06,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:06,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:06,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:06,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:06,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:06,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:06,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,903 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:06,994 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:06,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:06,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:06,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:06,994 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:06,995 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:06,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:31:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:07,032 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:07,033 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:07,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:07,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:07,033 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:07,033 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:07,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-26 21:31:07,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:07,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:07,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:07,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:07,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:07,168 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:07,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:07,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:07,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:07,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:07,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:07,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:07,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:07,197 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:07,302 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:07,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:07,302 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:07,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:07,303 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:07,303 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:07,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:31:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:07,339 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:07,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:07,339 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:07,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:07,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:07,339 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:07,339 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:07,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-26 21:31:07,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:07,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:07,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:07,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:07,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:07,402 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:07,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:07,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:07,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:07,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:07,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:07,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:07,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:07,439 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:07,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:07,540 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:07,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:07,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:07,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:07,540 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:07,540 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:07,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-26 21:31:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:07,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:07,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:31:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:07,574 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:07,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:07,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:07,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:07,574 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:07,574 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:07,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-26 21:31:07,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:07,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:07,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:07,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:07,648 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:07,655 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:07,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:07,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:07,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:07,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:07,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:07,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:07,680 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:31:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:07,774 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:31:07,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:07,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:07,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:07,774 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:07,774 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:31:07,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:07,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:31:07,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-26 21:31:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:07,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:07,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:07,814 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:07,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:07,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:07,814 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:07,815 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:07,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-26 21:31:07,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:07,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:07,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:07,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:07,932 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:07,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:07,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:07,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:07,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:07,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:07,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:07,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:07,957 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:08,031 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:31:08,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:08,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:08,032 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:08,032 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:31:08,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:31:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-26 21:31:08,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:08,065 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:08,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:08,065 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:08,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:08,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:08,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:08,066 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:08,066 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:08,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-26 21:31:08,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:08,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:08,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:08,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:08,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:08,123 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:08,131 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:08,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:08,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,154 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:08,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:08,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:08,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:08,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,155 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:08,229 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:31:08,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:08,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:08,230 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:31:08,230 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:31:08,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:31:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-26 21:31:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:08,264 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:08,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:08,264 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:08,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:08,265 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:08,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:08,265 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:08,265 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:08,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-26 21:31:08,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:08,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:08,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:08,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:08,328 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:08,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:08,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:08,343 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:08,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:08,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,366 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:08,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:08,436 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-26 21:31:08,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:08,436 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:08,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:08,437 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:31:08,437 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:31:08,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:31:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-26 21:31:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:31:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:31:08,464 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-26 21:31:08,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:08,465 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:31:08,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:08,465 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:31:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:08,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:08,465 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:08,465 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:08,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:08,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-26 21:31:08,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:08,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:08,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:08,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:08,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:08,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:08,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:08,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:08,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:08,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:08,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:08,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:08,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,572 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-26 21:31:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:08,669 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:08,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:08,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:08,669 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:08,669 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:08,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:08,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:31:08,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:08,709 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:08,709 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:08,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:08,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:08,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:08,711 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:08,711 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:08,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:08,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-26 21:31:08,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:08,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:08,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:08,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:08,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:08,792 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:08,800 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:08,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:08,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:08,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:08,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:08,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,831 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:08,958 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:08,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:08,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:08,959 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:08,959 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:08,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:08,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:31:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:09,000 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:09,001 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:09,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:09,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:09,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:09,001 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:09,001 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:09,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:09,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-26 21:31:09,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:09,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:09,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:09,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:09,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:09,062 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:09,068 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:09,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:09,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:09,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:09,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:09,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:09,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:09,093 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:09,207 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:09,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:09,207 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:09,208 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:09,208 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:09,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:09,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:31:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:09,250 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:09,250 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:09,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:09,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:09,250 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:09,250 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:09,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:09,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-26 21:31:09,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:09,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:09,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:09,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:09,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:09,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:09,320 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:09,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:09,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:09,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:09,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:09,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:09,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:09,346 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:09,468 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:09,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:09,468 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:09,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:09,469 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:09,469 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:09,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-26 21:31:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:09,506 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:31:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:09,506 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:09,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:09,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:09,507 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:09,507 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:09,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:09,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-26 21:31:09,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:09,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:09,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:09,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:09,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:09,564 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:09,572 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:09,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:09,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:09,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:09,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:09,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:09,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:09,598 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:31:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:09,724 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:09,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:09,724 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:09,724 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:09,724 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:09,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:31:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:09,772 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:09,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:09,772 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:09,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:09,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:09,772 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:09,773 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:09,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:09,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-26 21:31:09,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:09,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:09,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:09,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:09,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:09,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:09,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:09,904 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:09,904 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:09,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:09,905 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:10,016 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:10,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:10,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:10,017 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:10,017 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:10,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:10,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:31:10,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:10,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:10,061 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:10,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:10,061 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:10,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:10,061 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:10,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:10,062 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:10,062 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:10,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:10,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-26 21:31:10,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:10,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:10,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,063 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:10,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:10,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:10,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:10,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:10,130 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:10,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:10,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:10,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:10,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:10,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:10,157 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:10,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:10,273 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:10,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:10,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:10,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:10,274 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:10,274 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:10,275 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:31:10,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:10,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:10,320 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:10,320 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:10,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:10,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:10,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:10,321 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:10,321 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:10,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:10,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-26 21:31:10,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:10,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:10,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:10,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:10,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:10,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:10,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:10,419 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:10,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:10,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:10,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:10,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:10,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:10,444 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:10,550 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:10,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:10,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:10,551 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:10,551 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:10,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:10,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:10,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-26 21:31:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:31:10,584 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-26 21:31:10,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:10,585 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:31:10,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:31:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:10,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:10,585 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:10,585 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:10,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-26 21:31:10,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:10,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:10,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:10,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:10,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:10,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:10,779 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:10,784 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:10,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:10,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:10,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:10,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:10,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:10,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:10,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:10,809 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-26 21:31:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:10,909 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:10,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:10,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:10,910 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:10,910 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:10,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:31:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:10,958 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:10,958 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:10,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:10,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:10,959 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:10,959 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:10,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:10,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-26 21:31:10,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:10,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:10,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:10,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:11,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:11,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:11,040 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:11,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:11,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,065 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:11,065 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:11,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:11,066 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:11,179 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:11,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:11,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:11,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:11,180 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:11,180 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:11,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:11,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-26 21:31:11,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:11,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:11,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:11,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:11,230 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:11,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:11,230 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:11,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:11,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:11,231 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:11,231 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:11,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:11,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-26 21:31:11,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:11,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:11,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:11,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:11,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:11,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:11,326 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:11,336 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:11,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:11,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:11,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:11,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:11,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:11,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:11,362 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:11,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:11,496 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:11,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:11,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:11,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:11,496 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:11,496 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:11,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:31:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:11,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:11,580 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:11,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:11,581 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:11,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:11,581 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:11,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:11,581 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:11,582 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:11,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-26 21:31:11,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:11,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:11,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:11,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:11,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:11,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:11,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:11,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:11,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:11,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:11,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:11,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:11,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:11,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:11,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:11,769 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:11,868 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:11,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:11,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:11,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:11,869 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:11,869 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:11,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:11,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-26 21:31:11,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:11,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:31:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:11,907 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:11,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:11,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:11,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:11,908 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:11,908 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:11,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:11,908 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-26 21:31:11,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:11,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:11,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:11,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:11,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:12,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:12,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:12,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:12,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:12,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:12,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:12,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:12,073 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:31:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:12,170 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:31:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:12,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:12,170 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:12,171 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:31:12,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:31:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-26 21:31:12,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:12,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:12,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:12,214 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:12,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:12,214 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:12,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:12,215 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:12,215 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:12,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-26 21:31:12,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:12,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:12,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:12,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:12,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:12,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:12,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:12,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:12,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:12,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:12,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:12,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:12,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:12,489 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:12,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:12,575 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:31:12,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:12,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:12,576 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:12,576 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:31:12,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:31:12,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-26 21:31:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:12,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:12,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:12,619 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:12,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:12,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:12,619 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:12,619 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:12,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:12,620 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-26 21:31:12,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:12,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:12,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:12,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:12,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:12,689 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:12,695 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:12,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:12,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:12,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:12,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:12,720 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:12,810 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-26 21:31:12,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:12,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:12,811 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:31:12,811 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:31:12,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:31:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-26 21:31:12,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:12,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:12,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:12,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:12,863 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:12,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:12,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:12,864 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:12,864 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:12,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:12,864 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-26 21:31:12,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:12,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:12,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:12,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:12,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:12,932 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:12,940 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:12,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:12,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:12,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:12,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:12,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:12,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:12,967 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:13,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:13,054 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-26 21:31:13,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:13,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:13,055 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:31:13,055 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:31:13,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:31:13,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-26 21:31:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:31:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:31:13,085 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-26 21:31:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:13,086 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:31:13,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:31:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:13,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:13,086 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:13,086 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:13,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-26 21:31:13,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:13,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:13,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:13,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:13,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:13,149 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:13,159 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:13,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:13,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:13,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:13,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:13,183 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-26 21:31:13,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:13,339 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:13,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:13,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:13,340 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:13,340 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:13,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:13,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:13,395 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:13,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:13,396 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:13,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:13,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:13,396 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:13,396 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:13,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-26 21:31:13,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:13,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:13,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:13,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:13,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:13,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,466 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:13,489 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:13,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:13,489 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:13,649 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:13,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:13,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:13,649 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:13,649 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:13,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-26 21:31:13,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:13,703 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:13,703 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:13,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:13,703 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:13,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:13,704 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:13,704 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:13,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-26 21:31:13,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:13,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:13,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:13,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:13,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:13,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:13,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:13,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:13,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:13,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:13,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:13,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:13,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:13,836 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:14,005 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:14,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:14,005 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:14,005 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:14,006 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:14,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:14,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:14,064 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:14,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:14,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:14,064 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:14,064 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:14,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-26 21:31:14,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:14,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:14,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:14,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:14,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:14,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:14,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:14,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:14,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:14,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:14,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:14,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:14,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:14,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:14,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:14,165 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:14,376 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:14,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:14,377 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:14,377 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:14,377 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:14,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-26 21:31:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:14,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:14,459 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:14,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:14,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:14,460 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:14,460 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:14,461 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-26 21:31:14,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:14,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:14,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:14,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:15,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:15,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:15,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:15,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:15,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:15,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:15,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:15,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:15,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:15,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:15,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:15,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:15,329 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:15,859 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:15,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:15,859 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:15,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:15,859 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:15,860 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:15,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:15,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:31:15,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:15,918 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:15,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:15,918 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:15,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:15,918 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:15,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:15,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:15,919 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:15,919 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:15,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-26 21:31:15,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:15,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:15,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:15,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:16,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:16,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:16,061 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:16,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:16,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:16,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:16,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:16,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:16,087 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:16,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:16,235 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:16,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:16,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:16,236 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:16,236 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:16,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:16,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-26 21:31:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:16,301 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:16,301 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:16,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:16,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:16,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:16,302 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:16,302 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:16,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:16,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-26 21:31:16,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:16,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:16,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:16,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:16,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:16,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:16,395 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:16,404 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:16,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:16,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:16,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:16,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:16,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:16,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:16,429 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:16,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:16,589 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:16,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:16,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:16,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:16,597 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:16,597 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:16,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:31:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:16,662 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:16,663 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:16,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:16,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:16,664 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:16,664 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:16,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:16,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-26 21:31:16,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:16,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:16,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:16,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:16,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:16,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:16,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:16,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:16,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:16,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:16,785 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:16,933 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:16,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:16,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:16,933 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:16,933 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:16,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:16,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-26 21:31:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:16,978 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:31:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:16,978 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:16,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:16,978 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:16,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:16,979 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:16,979 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:16,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-26 21:31:16,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:16,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:16,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:16,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:17,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:17,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:17,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:17,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:17,072 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:17,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:17,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:17,097 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:17,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:17,097 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:31:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:17,260 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:17,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:17,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:17,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:17,260 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:17,260 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:17,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:17,323 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:17,323 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:17,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:17,323 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:17,324 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:17,324 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:17,324 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:17,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:17,324 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-26 21:31:17,324 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:17,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:17,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:17,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:17,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:17,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:17,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:17,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:17,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:17,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:17,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:17,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:17,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:17,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:17,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:17,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:17,493 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:17,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:17,710 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:17,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:17,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:17,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:17,711 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:17,711 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:17,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:17,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-26 21:31:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:17,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:17,808 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:17,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:17,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:17,809 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:17,809 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:17,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-26 21:31:17,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:17,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:17,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:17,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:17,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:18,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:18,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:18,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:18,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:18,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:18,260 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:18,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:18,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:18,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:18,260 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:18,412 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:18,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:18,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:18,413 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:18,413 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:18,414 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:18,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:18,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:18,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:18,475 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:18,475 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:18,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:18,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:18,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:18,476 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:18,476 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:18,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:18,476 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-26 21:31:18,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:18,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:18,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:18,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:18,640 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:18,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:18,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:18,655 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:18,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:18,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:18,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:18,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:18,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:18,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:18,680 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:18,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:18,837 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:18,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:18,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:18,838 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:18,838 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:18,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:18,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-26 21:31:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:18,892 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:18,893 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:18,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:18,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:18,893 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:18,893 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:18,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-26 21:31:18,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:18,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:18,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:18,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:18,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:18,966 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:18,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:18,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:18,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:18,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:18,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:18,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:18,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:18,998 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:19,140 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:19,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:19,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:19,140 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:19,140 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:19,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:19,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:31:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:19,203 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:19,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:19,203 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:19,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:19,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:19,203 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:19,203 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:19,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:19,204 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-26 21:31:19,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:19,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:19,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:19,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:19,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:19,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:19,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:19,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:19,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:19,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:19,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:19,300 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:19,444 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:19,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:19,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:19,445 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:19,445 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:19,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:19,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-26 21:31:19,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:19,506 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:19,506 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:19,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:19,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:19,507 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:19,507 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:19,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:19,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-26 21:31:19,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:19,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:19,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:19,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:19,576 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:19,583 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:19,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:19,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:19,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:19,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:19,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:19,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:19,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:19,613 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:19,748 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:19,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:19,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:19,749 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:19,749 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:19,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:19,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:31:19,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:19,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:19,814 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:19,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:19,814 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:19,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:19,814 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:19,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:19,814 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:19,814 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:19,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:19,815 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-26 21:31:19,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:19,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:19,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:19,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:19,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:19,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:19,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:19,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:19,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:19,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:19,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:19,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:19,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:19,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:19,953 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:20,088 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:20,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:20,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:20,088 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:20,088 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:20,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:20,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-26 21:31:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:31:20,134 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-26 21:31:20,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:20,135 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:31:20,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:31:20,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:20,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:20,135 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:20,135 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:20,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-26 21:31:20,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:20,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:20,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:20,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:20,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:20,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:20,201 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:20,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:20,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:20,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:20,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:20,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:20,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:20,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:20,233 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-26 21:31:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:20,444 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:20,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:20,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:20,445 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:20,445 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:20,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:31:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:20,514 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:20,514 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:20,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:20,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:20,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:20,515 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:20,515 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:20,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:20,515 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-26 21:31:20,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:20,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:20,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:20,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:20,585 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:20,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:20,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:20,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:20,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:20,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:20,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:20,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:20,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:20,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:20,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:20,625 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:20,795 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:20,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:20,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:20,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:20,797 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:20,797 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:20,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-26 21:31:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:20,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:20,865 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:20,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:20,865 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:20,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:20,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:20,866 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:20,866 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:20,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:20,866 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-26 21:31:20,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:20,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:20,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:20,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:20,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:20,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:20,947 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:20,954 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:20,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:20,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:20,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:20,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:20,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:20,977 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:21,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:21,125 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:21,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:21,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:21,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:21,126 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:21,126 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:21,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:21,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-26 21:31:21,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:21,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:21,202 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:21,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:21,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:21,203 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:21,203 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:21,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-26 21:31:21,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:21,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:21,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:21,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:21,270 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:21,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:21,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:21,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:21,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:21,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:21,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:21,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:21,312 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:21,465 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:21,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:21,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:21,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:21,471 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:21,471 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:21,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:21,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-26 21:31:21,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:21,532 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:21,533 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:21,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:21,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:21,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:21,533 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:21,533 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:21,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-26 21:31:21,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:21,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:21,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:21,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:21,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:21,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:21,605 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:21,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:21,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:21,629 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:21,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:21,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:21,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:21,629 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:21,784 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:21,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:21,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:21,785 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:21,785 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:21,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:21,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:31:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:21,856 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:21,856 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:21,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:21,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:21,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:21,857 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:21,857 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:21,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-26 21:31:21,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:21,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:21,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:21,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:21,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:21,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:21,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:21,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:21,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:21,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:21,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:21,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:21,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:21,954 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:22,114 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:22,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:22,114 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:22,115 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:22,115 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:22,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-26 21:31:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:22,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:22,178 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:22,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:22,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:22,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:22,178 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:22,178 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:22,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:22,179 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-26 21:31:22,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:22,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:22,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:22,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:22,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:22,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:22,318 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:22,323 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:22,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:22,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:22,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:22,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:22,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:22,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:22,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:22,349 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:22,498 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:22,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:22,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:22,499 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:22,499 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:22,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:22,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-26 21:31:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:22,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:22,567 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:22,567 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:22,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:22,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:22,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:22,567 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:22,568 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:22,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-26 21:31:22,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:22,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:22,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:22,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:22,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:22,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:22,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:22,655 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:22,663 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:22,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:22,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:22,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:22,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:22,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:22,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:22,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:22,697 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:23,135 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:23,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:23,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:23,136 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:23,136 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:23,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-26 21:31:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:23,190 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-26 21:31:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:23,190 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:23,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:23,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:23,190 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-26 21:31:23,190 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:23,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:23,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-26 21:31:23,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:23,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:23,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:23,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:23,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:23,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:23,257 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:23,263 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:23,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:23,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:23,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:23,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:23,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:23,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:23,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:23,287 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-26 21:31:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:23,421 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:23,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:23,421 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:23,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:23,422 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:23,422 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:23,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:31:23,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:23,497 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:23,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:23,497 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:23,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:23,497 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:23,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:23,498 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:23,498 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:23,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-26 21:31:23,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:23,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:23,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:23,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:23,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:23,707 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:23,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:23,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:23,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:23,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:23,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:23,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:23,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:23,745 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:23,880 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:23,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:23,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:23,881 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:23,881 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:23,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-26 21:31:23,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:23,975 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:23,975 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:23,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:23,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:23,976 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:23,976 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:23,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:23,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-26 21:31:23,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:23,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:23,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:23,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:24,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:24,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:24,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:24,189 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:24,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:24,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:24,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:24,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:24,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:24,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:24,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:24,214 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:24,357 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:24,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:24,357 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:24,358 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:24,358 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:24,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:24,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:31:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:24,429 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:24,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:24,429 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:24,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:24,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:24,430 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:24,430 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:24,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:24,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-26 21:31:24,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:24,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:24,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:24,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:24,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:24,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:24,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:24,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:24,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-26 21:31:24,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:24,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:24,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:24,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:24,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:24,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:24,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:24,607 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:24,736 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:24,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:24,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:24,737 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:24,737 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:24,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-26 21:31:24,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:24,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-26 21:31:24,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:24,834 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:24,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:24,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:24,834 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-26 21:31:24,834 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:24,835 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:24,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-26 21:31:24,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:24,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:24,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:24,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:25,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:25,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:25,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:25,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:25,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,183 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:25,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:25,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:25,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:25,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:25,184 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-26 21:31:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:25,311 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:25,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:25,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:25,311 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:25,311 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:25,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:25,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-26 21:31:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:25,384 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:25,384 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:25,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:25,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:25,384 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:25,385 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:25,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:25,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-26 21:31:25,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:25,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:25,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:25,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:25,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:25,618 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:25,626 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:31:25,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:25,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:25,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:25,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:25,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:25,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:25,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:25,653 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:25,884 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:25,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:25,884 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:25,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:25,884 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:25,885 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:25,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:25,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:25,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-26 21:31:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:25,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-26 21:31:25,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:25,955 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:25,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:25,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:25,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:25,955 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-26 21:31:25,955 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:25,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:25,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-26 21:31:25,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:25,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:25,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:25,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:26,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:26,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:26,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:26,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:26,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:26,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:26,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:26,054 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-26 21:31:26,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:26,187 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-26 21:31:26,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:26,187 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:26,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:26,187 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:31:26,187 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:31:26,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:31:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-26 21:31:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:26,261 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-26 21:31:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:26,261 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:26,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:31:26,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:26,262 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-26 21:31:26,262 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:26,262 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:26,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-26 21:31:26,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:26,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:26,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:26,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:26,318 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:26,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:26,326 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:26,333 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:31:26,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:26,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:26,337 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:26,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-26 21:31:26,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:31:26,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:31:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:26,363 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-26 21:31:26,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:26,493 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-26 21:31:26,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:31:26,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-26 21:31:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:26,494 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:31:26,494 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:31:26,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:31:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:31:26,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-26 21:31:26,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:31:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-26 21:31:26,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-26 21:31:26,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:26,567 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-26 21:31:26,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:31:26,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-26 21:31:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:26,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:26,568 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-26 21:31:26,568 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:26,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-26 21:31:26,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:26,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:26,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:26,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:26,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:26,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:26,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:26,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:26,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:26,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:26,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:26,825 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-26 21:31:27,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:27,038 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:27,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:27,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:27,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:27,040 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:27,040 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:27,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:27,136 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:27,137 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:27,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:27,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:27,137 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:27,137 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:27,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:27,138 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-26 21:31:27,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:27,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:27,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:27,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:27,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:27,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:27,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:27,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:27,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:27,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:27,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:27,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:27,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:27,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:27,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:27,257 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:27,459 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:27,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:27,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:27,459 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:27,459 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:27,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:27,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:27,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:27,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:27,554 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:27,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:27,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:27,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:27,554 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:27,555 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:27,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-26 21:31:27,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:27,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:27,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:27,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:27,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:27,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:27,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:27,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:27,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:27,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:27,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:27,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:27,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:27,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:27,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:27,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:27,705 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:27,913 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:27,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:27,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:27,914 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:27,914 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:27,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:28,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:28,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:28,005 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:28,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:28,005 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:28,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:28,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:28,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:28,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:28,006 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:28,006 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:28,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:28,006 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-26 21:31:28,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:28,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:28,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:28,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:28,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:28,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:28,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:28,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:28,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:28,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:28,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:28,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:28,132 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:28,355 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:28,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:28,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:28,356 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:28,356 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:28,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:31:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:28,435 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:28,435 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:28,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:28,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:28,435 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:28,436 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:28,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:28,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-26 21:31:28,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:28,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:28,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:28,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:28,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:28,505 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:28,511 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:28,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:28,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:28,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:28,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:28,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:28,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:28,536 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:28,730 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:28,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:28,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:28,731 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:28,731 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:28,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:31:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:28,821 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:28,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:28,822 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:28,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:28,822 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:28,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:28,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:28,822 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:28,822 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:28,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:28,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-26 21:31:28,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:28,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:28,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:28,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:28,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:28,902 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:28,910 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:28,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:28,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:28,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:28,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:28,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:28,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:28,937 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:29,139 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:29,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:29,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:29,140 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:29,140 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:29,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:31:29,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:29,228 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:29,229 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:29,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:29,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:29,229 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:29,229 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:29,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:29,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-26 21:31:29,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:29,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:29,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:29,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:29,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:29,419 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:29,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:29,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:29,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,452 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:29,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:29,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:29,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:29,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:29,453 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:29,646 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:29,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:29,646 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:29,647 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:29,647 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:29,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:29,748 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:29,748 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:29,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:29,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:29,748 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:29,749 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:29,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-26 21:31:29,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:29,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:29,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:29,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:29,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:29,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:29,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:29,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:29,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:29,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:29,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:29,849 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:30,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:30,031 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:30,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:30,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:30,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:30,032 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:30,032 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:30,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:30,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-26 21:31:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:30,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:30,109 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:31:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:30,109 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:30,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:30,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:30,110 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:30,110 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:30,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-26 21:31:30,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:30,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:30,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:30,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:30,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:30,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:30,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:30,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:30,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:30,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:30,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:30,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:30,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:30,229 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:31:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:30,450 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:30,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:30,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:30,451 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:30,451 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:30,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:30,544 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:30,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:30,544 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:30,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:30,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:30,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:30,545 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:30,545 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:30,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-26 21:31:30,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:30,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:30,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:30,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:30,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:30,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:30,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:30,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:30,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:30,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:30,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:30,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:30,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:30,667 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:30,880 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:30,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:30,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:30,881 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:30,881 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:30,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:30,979 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:30,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:30,980 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:30,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:30,980 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:30,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:30,980 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:30,980 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:30,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:30,980 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-26 21:31:30,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:30,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:30,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:30,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:31,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:31,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:31,071 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:31,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:31,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:31,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:31,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:31,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:31,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:31,100 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:31,338 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:31,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:31,338 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:31,339 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:31,339 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:31,339 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:31,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:31,430 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:31,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:31,430 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:31,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:31,430 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:31,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:31,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:31,431 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:31,431 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:31,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:31,431 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-26 21:31:31,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:31,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:31,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:31,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:31,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:31,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:31,499 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:31,507 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:31,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:31,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:31,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:31,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:31,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:31,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:31,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:31,532 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:31,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:31,758 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:31,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:31,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:31,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:31,759 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:31,759 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:31,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:31,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:31:31,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:31,842 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:31,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:31,842 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:31,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:31,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:31,843 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:31,843 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:31,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:31,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-26 21:31:31,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:31,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:31,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:31,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:31,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:32,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:32,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:32,074 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:32,082 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:32,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:32,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:32,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:32,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:32,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:32,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:32,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:32,117 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:32,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:32,325 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:32,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:32,325 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:32,326 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:32,326 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:32,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:32,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:32,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:31:32,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:32,419 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:32,419 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:32,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:32,419 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:32,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:32,419 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:32,419 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:32,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-26 21:31:32,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:32,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:32,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:32,420 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:32,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:33,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:33,461 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:33,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:33,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:33,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:33,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:33,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:33,515 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:33,733 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:33,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:33,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:33,734 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:33,734 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:33,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:31:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:33,827 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:33,827 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:33,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:33,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:33,827 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:33,827 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:33,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:33,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-26 21:31:33,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:33,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:33,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:33,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:33,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:33,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:33,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:33,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:33,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:33,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:33,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:33,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:33,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:33,932 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:34,140 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:34,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:34,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:34,141 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:34,141 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:34,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:34,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:34,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:34,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:34,246 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:34,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:34,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:34,247 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:34,247 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:34,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:34,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-26 21:31:34,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:34,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:34,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:34,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:34,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:34,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:34,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:34,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:34,349 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:34,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:34,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:34,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:34,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:34,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:34,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:34,375 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:34,569 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:34,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:34,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:34,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:34,570 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:34,570 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:34,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-26 21:31:34,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:34,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-26 21:31:34,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:34,645 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:34,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:34,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:34,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:34,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:34,646 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:34,646 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:34,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:34,646 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-26 21:31:34,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:34,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:34,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:34,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:34,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:34,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:34,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:34,716 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:34,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:34,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:34,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:34,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:34,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:34,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:34,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:34,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:34,745 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-26 21:31:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:34,971 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:34,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:34,971 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:34,972 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:34,972 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:34,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:35,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:35,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:35,071 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:35,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:35,071 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:35,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:35,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:35,071 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:35,071 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:35,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-26 21:31:35,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:35,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:35,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:35,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:35,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:35,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:35,167 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:35,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:35,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:35,171 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:35,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:35,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:35,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:35,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:35,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:35,191 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:35,404 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:35,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:35,404 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:35,405 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:35,405 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:35,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:35,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:31:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:35,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:35,506 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:35,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:35,507 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:35,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:35,507 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:35,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:35,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:35,507 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:35,507 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:35,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:35,507 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-26 21:31:35,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:35,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:35,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:35,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:35,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:35,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:35,604 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:35,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:35,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:35,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:35,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:35,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:35,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:35,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:35,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:35,638 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:35,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:35,838 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:35,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:35,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:35,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:35,839 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:35,839 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:35,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:35,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:31:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:35,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:35,950 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:35,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:35,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:35,950 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:35,950 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:35,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-26 21:31:35,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:35,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:35,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:35,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:36,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:36,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:36,032 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:36,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:36,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:36,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:36,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:36,053 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:36,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:36,239 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:36,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:36,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:36,239 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:36,239 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:36,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:36,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:31:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:36,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:36,333 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:36,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:36,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:36,334 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:36,334 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:36,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-26 21:31:36,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:36,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:36,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:36,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:36,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,403 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:36,403 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:36,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:36,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:36,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:36,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:36,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:36,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:36,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:36,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:36,443 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:36,650 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:36,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:36,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:36,651 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:36,651 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:36,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:36,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:36,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:36,754 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:36,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:36,754 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:36,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:36,754 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:36,754 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:36,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:36,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-26 21:31:36,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:36,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:36,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:36,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:36,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:36,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:36,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:36,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:36,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:36,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:36,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:36,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:36,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:36,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:36,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:36,854 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,065 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:37,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:37,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,066 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:37,066 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:37,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:37,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:31:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:37,169 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,169 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:37,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:37,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,170 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:37,170 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-26 21:31:37,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:37,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:37,231 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:37,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:37,245 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:37,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:37,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:37,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:37,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:37,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:37,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:37,271 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,474 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:37,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:37,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,475 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:37,475 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:37,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:31:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:37,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:37,576 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:37,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:37,577 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:37,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:37,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:37,577 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:37,577 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:37,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:37,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-26 21:31:37,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:37,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:37,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:37,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:37,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:37,721 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:37,734 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:37,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:37,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:37,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:37,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:37,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:37,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:37,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:37,776 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:37,980 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:37,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:37,980 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:37,980 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:37,981 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:37,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:38,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:31:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:38,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:31:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:38,067 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:38,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:38,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:38,068 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:38,068 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:38,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-26 21:31:38,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:38,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:38,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:38,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:38,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:38,145 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:38,153 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:38,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:38,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:38,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:38,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:38,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:38,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:38,178 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:31:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:38,380 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:38,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:38,380 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:38,381 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:38,381 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:38,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:31:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:38,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:38,491 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:38,491 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:38,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:38,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:38,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:38,491 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:38,491 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:38,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:38,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-26 21:31:38,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:38,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:38,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:38,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:38,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:38,593 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:38,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:38,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:38,624 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:38,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:38,624 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:38,821 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:38,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:38,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:38,822 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:38,822 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:38,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:38,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:31:38,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:38,946 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:38,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:38,946 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:38,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:38,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:38,946 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:38,946 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:38,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:38,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-26 21:31:38,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:38,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:38,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:38,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:39,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:39,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:39,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:39,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:39,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:39,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:39,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:39,069 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:39,283 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:39,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:39,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:39,284 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:39,284 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:39,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:31:39,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:39,399 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:39,399 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:39,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:39,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:39,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:39,399 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:39,399 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:39,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:39,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-26 21:31:39,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:39,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:39,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:39,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:39,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:39,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:39,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:39,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:39,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:39,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:39,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:39,508 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:39,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:39,723 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:39,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:39,723 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:39,723 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:39,724 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:39,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:39,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:31:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:39,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:39,831 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:39,831 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:39,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:39,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:39,832 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:39,832 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:39,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-26 21:31:39,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:39,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:39,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:39,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:39,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:39,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:39,913 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:39,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:39,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:39,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:39,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:39,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:39,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:39,936 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:40,126 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:40,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:40,126 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:40,126 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:40,126 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:40,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-26 21:31:40,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:40,245 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:40,246 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:40,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:40,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:40,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:40,246 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:40,246 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:40,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:40,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-26 21:31:40,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:40,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:40,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:40,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:40,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:40,315 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:40,323 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:40,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:40,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:40,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:40,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:40,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:40,348 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:40,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:40,536 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:40,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:40,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:40,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:40,537 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:40,537 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:40,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:40,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-26 21:31:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:40,639 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:40,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:40,639 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:40,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:40,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:40,640 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:40,640 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:40,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-26 21:31:40,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:40,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:40,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:40,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:40,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:40,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:40,723 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:40,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:40,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:40,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:40,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:40,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:40,747 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:40,919 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:40,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:40,919 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:40,920 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:40,920 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:40,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-26 21:31:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:41,026 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:41,026 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:41,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:41,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:41,027 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:41,027 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:41,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-26 21:31:41,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:41,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:41,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:41,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:41,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:41,106 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:41,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:41,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:41,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:41,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:41,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:41,135 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:41,295 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-26 21:31:41,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:41,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:41,296 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:31:41,296 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:31:41,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:31:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-26 21:31:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:31:41,370 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-26 21:31:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:41,370 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:31:41,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:31:41,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:41,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:41,371 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:41,371 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:41,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:41,371 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-26 21:31:41,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:41,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:41,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:41,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:41,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:41,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:41,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:41,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:41,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:41,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:41,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:41,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:41,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:41,488 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-26 21:31:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:41,806 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:41,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:41,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:41,807 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:41,807 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:41,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:41,930 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:41,930 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:41,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:41,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:41,931 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:41,931 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:41,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-26 21:31:41,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:41,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:41,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:41,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:41,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:41,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:42,000 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:42,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:42,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:42,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:42,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:42,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:42,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:42,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:42,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:42,043 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:42,321 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:42,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:42,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:42,322 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:42,322 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:42,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:42,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:42,467 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:42,467 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:42,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:42,467 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:42,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:42,468 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:42,468 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:42,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:42,468 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-26 21:31:42,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:42,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:42,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:42,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:42,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:42,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:42,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:42,548 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:42,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:42,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:42,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:42,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:42,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:42,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:42,572 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:42,846 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:42,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:42,846 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:42,846 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:42,846 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:42,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:42,969 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:42,969 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:42,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:42,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:42,970 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:42,970 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:42,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:42,970 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-26 21:31:42,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:42,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:42,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:42,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:43,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:43,203 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:43,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:43,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:43,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:43,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:43,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:43,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:43,237 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:43,504 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:43,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:43,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:43,504 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:43,504 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:43,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:43,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:31:43,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:43,619 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:43,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:43,619 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:43,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:43,619 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:43,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:43,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:43,619 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:43,619 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:43,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:43,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-26 21:31:43,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:43,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:43,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:43,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:43,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:43,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:43,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:43,718 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:43,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:43,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:43,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:43,754 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:43,754 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:43,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:43,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:43,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:43,755 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:43,994 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:43,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:43,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:43,995 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:43,995 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:43,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:43,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:31:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:44,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:44,121 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:44,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:44,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:44,121 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:44,121 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:44,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-26 21:31:44,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:44,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:44,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:44,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:44,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:44,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:44,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:44,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:44,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:44,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:44,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:44,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:44,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:44,223 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:44,494 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:44,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:44,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:44,495 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:44,495 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:44,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:31:44,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:44,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:44,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:44,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:44,623 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:44,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:44,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:44,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:44,623 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:44,623 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:44,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:44,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-26 21:31:44,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:44,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:44,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:44,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:45,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:45,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:45,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:45,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:45,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:45,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:45,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:45,235 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:45,482 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:45,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:45,482 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:45,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:45,483 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:45,483 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:45,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:45,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:45,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:45,606 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:45,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:45,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:45,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:45,606 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:45,606 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:45,606 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:45,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-26 21:31:45,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:45,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:45,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:45,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:45,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:45,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:45,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:45,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:45,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:45,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:45,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:45,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:45,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:45,708 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:45,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:45,943 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:45,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:45,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:45,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:45,944 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:45,944 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:45,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:45,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:46,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-26 21:31:46,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:46,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:31:46,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:46,046 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:46,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:46,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:46,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:46,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:46,046 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:46,046 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:46,046 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:46,046 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-26 21:31:46,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:46,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:46,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:46,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:46,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:46,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:46,212 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:46,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:46,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:46,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:46,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:46,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:46,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:46,237 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:31:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:46,525 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:46,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:46,525 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:46,525 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:46,525 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:46,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:46,657 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:46,658 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:46,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:46,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:46,658 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:46,658 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:46,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:46,659 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-26 21:31:46,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:46,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:46,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:46,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:46,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:46,726 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:46,736 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:46,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:46,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:46,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:46,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:46,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:46,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:46,761 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:47,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:47,046 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:47,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:47,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:47,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:47,047 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:47,047 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:47,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-26 21:31:47,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:47,175 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:47,175 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:47,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:47,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:47,176 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:47,176 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:47,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:47,176 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-26 21:31:47,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:47,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:47,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:47,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:47,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:47,269 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:47,277 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:47,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:47,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,302 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:47,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:47,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:47,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:47,302 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:47,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:47,575 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:31:47,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:47,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:47,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:47,576 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:31:47,576 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:31:47,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:31:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:31:47,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:47,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:47,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:47,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:47,706 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:47,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:47,706 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:47,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:47,706 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:47,706 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:47,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:47,706 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-26 21:31:47,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:47,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:47,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:47,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:47,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:47,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:47,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:47,791 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:47,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:47,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:47,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:47,812 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:48,061 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:31:48,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:48,061 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:48,061 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:31:48,061 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:31:48,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:31:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:31:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:48,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:48,178 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:48,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:48,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:48,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:48,179 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:48,179 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:48,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:48,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-26 21:31:48,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:48,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:48,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:48,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:48,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:48,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:48,277 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:48,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:48,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:48,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:48,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:48,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:48,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:48,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:48,305 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:48,560 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:48,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:48,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:48,561 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:48,561 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:48,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:31:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:48,692 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:48,692 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:48,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:48,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:48,693 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:48,693 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:48,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-26 21:31:48,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:48,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:48,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:48,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:48,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:48,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:48,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:48,773 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:48,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:48,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:48,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:48,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:48,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:48,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:48,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:48,807 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:49,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:49,075 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:31:49,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:49,075 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:49,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:49,076 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:31:49,076 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:31:49,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:49,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:31:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:31:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:49,203 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:49,203 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:49,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:49,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:49,203 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:49,203 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:49,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-26 21:31:49,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:49,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:49,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:49,264 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:49,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:49,271 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:49,276 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:49,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:49,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:49,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:49,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:49,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:49,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:49,300 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:49,569 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:49,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:49,569 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:49,570 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:49,570 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:49,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:49,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:49,697 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:49,697 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:49,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:49,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:49,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:49,698 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:49,698 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:49,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:49,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-26 21:31:49,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:49,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:49,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:49,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:49,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:49,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:49,824 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:49,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:49,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:49,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:49,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:49,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:49,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:49,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:49,849 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:50,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:50,272 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:50,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:50,272 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:50,272 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:50,273 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:50,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-26 21:31:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:31:50,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:31:50,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-26 21:31:50,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:50,437 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:31:50,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:50,437 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:31:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:50,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:50,437 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:50,438 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:50,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:50,438 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-26 21:31:50,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:50,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:50,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:50,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:50,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:51,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:51,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:51,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:51,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:51,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:51,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:51,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:51,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:51,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:51,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:51,584 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-26 21:31:51,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:51,977 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:51,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:51,977 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:51,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:51,978 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:51,978 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:51,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:52,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:52,115 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:52,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:52,115 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:52,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:52,116 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:52,116 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:52,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:52,116 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-26 21:31:52,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:52,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:52,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:52,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:52,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:52,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:52,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:52,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:52,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:52,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:52,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:52,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:52,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:52,216 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:52,484 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:52,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:52,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:52,484 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:52,484 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:52,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:52,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:31:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:52,612 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:52,612 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:52,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:52,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:52,613 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:52,613 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:52,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-26 21:31:52,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:52,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:52,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:52,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:52,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:52,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:52,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:52,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:52,692 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:52,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:52,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:52,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:52,715 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:52,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:52,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:52,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:52,716 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:52,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:52,974 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:52,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:52,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:52,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:52,975 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:52,975 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:52,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:31:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:53,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:53,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:53,108 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:53,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:53,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:53,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:53,108 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:53,108 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:53,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:53,108 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-26 21:31:53,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:53,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:53,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:53,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:53,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:53,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:53,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:53,193 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:53,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:53,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:53,217 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:53,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:53,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:53,217 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:53,441 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:53,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:53,441 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:53,442 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:53,442 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:53,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-26 21:31:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:53,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:53,564 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:53,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:53,564 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:53,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:53,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:53,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:53,565 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:53,565 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:53,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-26 21:31:53,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:53,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:53,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:53,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:53,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:53,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:53,645 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:53,650 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:53,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:53,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:53,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:53,673 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:53,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:53,674 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:53,933 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:53,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:53,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:53,934 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:53,934 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:53,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:54,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:31:54,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:54,064 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:54,064 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:54,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:54,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:54,064 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:54,065 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:54,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-26 21:31:54,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:54,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:54,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:54,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:54,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:54,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:54,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:54,135 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:54,144 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:54,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:54,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:54,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:54,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:54,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:54,168 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:54,445 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:31:54,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:54,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:54,445 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:31:54,445 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:31:54,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:31:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:31:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:54,593 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:54,594 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:54,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:54,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:54,594 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:54,594 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:54,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:54,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-26 21:31:54,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:54,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:54,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:54,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:54,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:54,656 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:54,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:54,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:54,671 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:54,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:54,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:54,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:54,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:54,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:54,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:54,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:54,695 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:54,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:54,953 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:31:54,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:54,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:54,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:54,954 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:31:54,954 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:31:54,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:31:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:31:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:55,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:55,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:55,099 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:55,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:55,099 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:55,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:55,100 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:55,100 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:55,100 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:55,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:55,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-26 21:31:55,100 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:55,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:55,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:55,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:55,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:55,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:55,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:55,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:55,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:55,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:55,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:55,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:55,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:55,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:55,197 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:55,436 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:55,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:55,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:55,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:55,437 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:55,437 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:55,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-26 21:31:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:31:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:31:55,550 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:31:55,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:55,550 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:31:55,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:31:55,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:55,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:55,551 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:55,551 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:55,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-26 21:31:55,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:55,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:55,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:55,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:55,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:55,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:55,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:55,616 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:55,623 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:55,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:55,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:55,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:55,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:55,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:55,648 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:31:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:55,901 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:55,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:55,901 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:55,902 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:55,902 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:55,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:31:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:56,057 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:56,057 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:56,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:56,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:56,058 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:56,058 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:56,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:56,059 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-26 21:31:56,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:56,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:56,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:56,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:56,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:56,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:56,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:56,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:56,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:56,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:56,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:56,296 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:56,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:56,530 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:56,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:56,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:56,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:56,531 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:56,531 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:56,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:56,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-26 21:31:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:56,675 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:56,675 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:56,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:56,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:56,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:56,676 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:56,676 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:56,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:56,676 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-26 21:31:56,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:56,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:56,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:56,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:56,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:56,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:31:56,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:31:56,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:56,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:56,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:56,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:56,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:56,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:56,778 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:57,008 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:31:57,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:57,008 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:57,008 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:31:57,008 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:31:57,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:31:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:31:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:57,141 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:57,142 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:57,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:57,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:57,142 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:57,142 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:57,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:57,142 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-26 21:31:57,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:57,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:57,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:57,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:57,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:57,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:57,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:57,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:57,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:31:57,234 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:31:57,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:57,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:57,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:57,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:57,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:57,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:57,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:57,259 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:57,490 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:31:57,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:57,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:57,491 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:31:57,491 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:31:57,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:31:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-26 21:31:57,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:31:57,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:31:57,615 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:31:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:57,615 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:31:57,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:31:57,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:57,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:57,615 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:31:57,616 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:57,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-26 21:31:57,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:57,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:57,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:57,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:57,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:57,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:57,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:57,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:57,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:31:57,722 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:31:57,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:57,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:57,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:57,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:57,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:57,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:57,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:57,746 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:31:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:57,980 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:57,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:57,981 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:57,981 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:57,981 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:57,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-26 21:31:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:58,124 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:58,124 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:58,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:58,124 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:58,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:58,125 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:58,125 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:58,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:58,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-26 21:31:58,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:58,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:58,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:58,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:58,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:58,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:58,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:58,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:58,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:58,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:58,269 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:58,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:58,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:58,269 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:58,493 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:31:58,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:58,493 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:58,493 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:31:58,494 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:31:58,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:31:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-26 21:31:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:31:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:31:58,635 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:31:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:58,636 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:31:58,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:58,636 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:31:58,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:58,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:58,636 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:31:58,636 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:58,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:58,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-26 21:31:58,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:58,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:58,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:58,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:31:58,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:58,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:58,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:58,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:31:58,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:31:58,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:58,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:58,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:58,737 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:58,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:58,738 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:31:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:58,960 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-26 21:31:58,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:58,960 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:58,960 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:31:58,960 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:31:58,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:58,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:31:59,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-26 21:31:59,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:31:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:31:59,102 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:31:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:59,103 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:31:59,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:31:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:59,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:59,103 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:59,103 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:59,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-26 21:31:59,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:59,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:59,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:59,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:31:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:59,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:31:59,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:31:59,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:31:59,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:31:59,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:31:59,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:31:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:31:59,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:31:59,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:31:59,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:31:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:31:59,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:59,213 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:31:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:31:59,424 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-26 21:31:59,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:31:59,430 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:31:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:31:59,430 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:31:59,430 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:31:59,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:31:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:31:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-26 21:31:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:31:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:31:59,518 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-26 21:31:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:31:59,518 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:31:59,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:31:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:31:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:31:59,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:31:59,518 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:31:59,519 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:31:59,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:31:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-26 21:31:59,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:31:59,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:31:59,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:59,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:31:59,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:31:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:00,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:00,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:00,047 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:00,054 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:00,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:00,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:00,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:00,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:00,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:00,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:00,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:00,084 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-26 21:32:00,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:00,468 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:00,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:00,468 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:00,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:00,469 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:00,469 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:00,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:00,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:32:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:00,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:00,632 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:00,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:00,632 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:00,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:00,632 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:00,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:00,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:00,633 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:00,633 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:00,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:00,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-26 21:32:00,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:00,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:00,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:00,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:00,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:00,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:00,716 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:00,725 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:00,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:00,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:00,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:00,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:00,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:00,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:00,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:00,750 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:01,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:01,146 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:01,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:01,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:01,147 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:01,147 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:01,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:01,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:32:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:01,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:01,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:01,320 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:01,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:01,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:01,321 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:01,321 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:01,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:01,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-26 21:32:01,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:01,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:01,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:01,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:01,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:01,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:01,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:01,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:01,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:01,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:01,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:01,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:01,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:01,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:01,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:01,435 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:01,831 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:01,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:01,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:01,831 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:01,831 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:01,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:01,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:02,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:32:02,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:02,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:02,028 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:02,029 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:02,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:02,029 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:02,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:02,029 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:02,029 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:02,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:02,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-26 21:32:02,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:02,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:02,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:02,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:02,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:02,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:02,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:02,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:02,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:02,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:02,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:02,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:02,152 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:02,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:02,517 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:02,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:02,518 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:02,519 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:02,519 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:02,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:02,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:02,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-26 21:32:02,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:02,674 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:02,674 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:02,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:02,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:02,675 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:02,675 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:02,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:02,675 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-26 21:32:02,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:02,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:02,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:02,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:02,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:02,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:02,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:02,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:02,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:02,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:02,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:02,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:02,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:02,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:02,774 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:03,177 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:03,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:03,177 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:03,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:03,177 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:03,177 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:03,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:03,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:03,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:32:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:03,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:03,348 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:03,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:03,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:03,348 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:03,348 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:03,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:03,348 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-26 21:32:03,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:03,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:03,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:03,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:03,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:03,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:03,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:03,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:03,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:03,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:03,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:03,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:03,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:03,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:03,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:03,479 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:03,873 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:03,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:03,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:03,874 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:03,874 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:03,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:32:04,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:04,047 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:04,047 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:04,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:04,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:04,047 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:04,047 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:04,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-26 21:32:04,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:04,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:04,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:04,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:04,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:04,108 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:04,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:04,115 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:04,122 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:04,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:04,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:04,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:04,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:04,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:04,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:04,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:04,145 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:04,514 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:04,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:04,514 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:04,515 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:04,515 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:04,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:04,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:32:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:04,679 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:04,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:04,679 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:04,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:04,679 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:04,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:04,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:04,679 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:04,680 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:04,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:04,680 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-26 21:32:04,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:04,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:04,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:04,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:04,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:04,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:04,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:04,753 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:04,762 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:04,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:04,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:04,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:04,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:04,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:04,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:04,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:04,786 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:05,138 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:05,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:05,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:05,139 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:05,139 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:05,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:05,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:05,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-26 21:32:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:32:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:32:05,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:32:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:05,287 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:32:05,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:32:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:05,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:05,287 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:05,288 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:05,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-26 21:32:05,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:05,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:05,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:05,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:05,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:05,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:05,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:05,745 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:05,756 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:05,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:05,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:05,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:05,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:05,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:05,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:05,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:05,780 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:32:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:06,150 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:06,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:06,150 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:06,150 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:06,150 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:06,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:06,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:32:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:06,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:06,316 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:06,316 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:06,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:06,316 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:06,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:06,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:06,317 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:06,317 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:06,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-26 21:32:06,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:06,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:06,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:06,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:06,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:06,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:06,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:06,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:06,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:06,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:06,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:06,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:06,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:06,413 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:06,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:06,827 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:06,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:06,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:06,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:06,828 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:06,828 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:06,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:06,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:32:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:06,987 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:06,987 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:06,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:06,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:06,987 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:06,987 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:06,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:06,988 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-26 21:32:06,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:06,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:06,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:06,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:07,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:07,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:07,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:07,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:07,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:07,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:07,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:07,167 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:07,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:07,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:07,167 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:07,653 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:07,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:07,653 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:07,653 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:07,653 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:07,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:07,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:07,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:32:07,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:07,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:07,822 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:07,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:07,822 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:07,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:07,822 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:07,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:07,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:07,822 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:07,822 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:07,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:07,823 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-26 21:32:07,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:07,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:07,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:07,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:07,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:07,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:07,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:07,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:07,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:07,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:07,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:07,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:07,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:07,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:07,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:07,929 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:08,302 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:08,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:08,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:08,303 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:08,303 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:08,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:08,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-26 21:32:08,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:08,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:08,463 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:08,463 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:08,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:08,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:08,464 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:08,464 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:08,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:08,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-26 21:32:08,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:08,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:08,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:08,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:08,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:08,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:08,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:08,576 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:08,581 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:08,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:08,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:08,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:08,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:08,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:08,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:08,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:08,614 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:09,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:09,165 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:09,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:09,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:09,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:09,165 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:09,165 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:09,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:32:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:09,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:09,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:09,335 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:09,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:09,335 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:09,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:09,335 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:09,336 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:09,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:09,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-26 21:32:09,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:09,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:09,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:09,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:09,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:09,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:09,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:09,404 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:09,411 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:09,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:09,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:09,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:09,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:09,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:09,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:09,435 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:09,780 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:09,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:09,780 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:09,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:09,781 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:09,781 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:09,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:32:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:09,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:09,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:09,946 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:09,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:09,946 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:09,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:09,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:09,946 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:09,946 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:09,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:09,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-26 21:32:09,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:09,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:09,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:09,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:09,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:10,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:10,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:10,012 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:10,021 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:10,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:10,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:10,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:10,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:10,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:10,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:10,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:10,045 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:10,400 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:32:10,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:10,400 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:10,401 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:32:10,401 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:32:10,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:32:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:32:10,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:10,586 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:10,586 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:10,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:10,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:10,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:10,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:10,587 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:10,587 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:10,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:10,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-26 21:32:10,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:10,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:10,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:10,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:10,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:10,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:10,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:10,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:10,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:10,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:10,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:10,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:10,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:10,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:10,718 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:11,032 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:11,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:11,032 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:11,033 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:11,033 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:11,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:11,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-26 21:32:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:32:11,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:32:11,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:32:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:11,169 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:32:11,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:32:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:11,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:11,169 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:11,170 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:11,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-26 21:32:11,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:11,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:11,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:11,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:11,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:11,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:11,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:11,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:11,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:11,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:11,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:11,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:11,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:11,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:11,272 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:32:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:11,685 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:11,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:11,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:11,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:11,686 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:11,686 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:11,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:32:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:11,868 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:11,868 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:11,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:11,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:11,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:11,868 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:11,869 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:11,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-26 21:32:11,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:11,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:11,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:11,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:11,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:11,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:11,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:11,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:11,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:11,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:11,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:11,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:11,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:11,981 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:12,394 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:12,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:12,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:12,395 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:12,395 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:12,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:32:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:12,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:12,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:12,586 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:12,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:12,586 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:12,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:12,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:12,586 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:12,586 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:12,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:12,587 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-26 21:32:12,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:12,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:12,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:12,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:12,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:12,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:12,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:12,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:12,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:12,679 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:12,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:12,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:12,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:12,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:12,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:12,705 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:13,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:13,156 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:13,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:13,156 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:13,157 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:13,157 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:13,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:13,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:13,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:32:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:13,352 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:13,353 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:13,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:13,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:13,353 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:13,353 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:13,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:13,353 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-26 21:32:13,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:13,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:13,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:13,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:13,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:13,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:13,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:13,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:13,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:13,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:13,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:13,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:13,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:13,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:13,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:13,463 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:13,872 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:13,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:13,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:13,873 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:13,873 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:13,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:14,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-26 21:32:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:14,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:14,042 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:14,042 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:14,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:14,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:14,042 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:14,043 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:14,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-26 21:32:14,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:14,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:14,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:14,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:14,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:14,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:14,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:14,122 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:14,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:14,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:14,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:14,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:14,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:14,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:14,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:14,146 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:14,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:14,589 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:14,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:14,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:14,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:14,590 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:14,590 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:14,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:14,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-26 21:32:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:14,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:14,775 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:14,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:14,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:14,776 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:14,776 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:14,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-26 21:32:14,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:14,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:14,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:14,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:14,842 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:14,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:14,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:14,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:14,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:14,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:14,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:14,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:14,884 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:15,334 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:15,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:15,334 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:15,335 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:15,335 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:15,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-26 21:32:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:15,514 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:15,514 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:15,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:15,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:15,515 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:15,515 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:15,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:15,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-26 21:32:15,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:15,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:15,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:15,515 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:15,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:15,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:15,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:15,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:15,597 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:15,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:15,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:15,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:15,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:15,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:15,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:15,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:15,621 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:16,039 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:16,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:16,039 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:16,040 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:16,040 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:16,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:16,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:16,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-26 21:32:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:16,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:16,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:16,234 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:16,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:16,235 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:16,235 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:16,235 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:16,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:16,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-26 21:32:16,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:16,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:16,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:16,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:16,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:16,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:16,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:16,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:16,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:16,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:16,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:16,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:16,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:16,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:16,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:16,336 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:16,736 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:16,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:16,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:16,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:16,737 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:16,737 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:16,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:16,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-26 21:32:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:32:16,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:32:16,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:32:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:16,904 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:32:16,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:32:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:16,904 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:16,904 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:16,905 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:16,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-26 21:32:16,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:16,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:16,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:16,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:16,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:16,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:16,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:16,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:16,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:16,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:17,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:17,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:17,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:17,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:17,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:17,010 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:32:17,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:17,427 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:17,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:17,427 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:17,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:17,428 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:17,428 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:17,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:17,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:32:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:17,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:17,613 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:17,613 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:17,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:17,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:17,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:17,614 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:17,614 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:17,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-26 21:32:17,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:17,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:17,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:17,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:17,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:17,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:17,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:17,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:17,701 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:17,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:17,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:17,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:17,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:17,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:17,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:17,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:17,725 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:18,137 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:18,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:18,137 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:18,137 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:18,137 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:18,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:18,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:32:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:18,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:18,321 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:18,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:18,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:18,321 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:18,321 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:18,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-26 21:32:18,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:18,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:18,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:18,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:18,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:18,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:18,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:18,671 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:18,684 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:18,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:18,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:18,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:18,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:18,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:18,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:18,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:18,707 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:19,093 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:19,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:19,093 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:19,094 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:19,094 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:19,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:32:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:19,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:19,281 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:19,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:19,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:19,281 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:19,281 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:19,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-26 21:32:19,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:19,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:19,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:19,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:19,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:19,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:19,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:19,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:19,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:19,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:19,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:19,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:19,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:19,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:19,378 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:19,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:19,774 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:19,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:19,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:19,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:19,775 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:19,775 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:19,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-26 21:32:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:19,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:19,956 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:19,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:19,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:19,957 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:19,957 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:19,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-26 21:32:19,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:19,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:19,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:19,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:19,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:20,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:20,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:20,046 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:20,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:20,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:20,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:20,073 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:20,073 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:20,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:20,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:20,074 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:20,440 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:20,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:20,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:20,440 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:20,440 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:20,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:20,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:32:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:20,636 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:20,636 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:20,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:20,636 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:20,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:20,636 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:20,636 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:20,636 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:20,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-26 21:32:20,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:20,637 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:20,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:20,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:20,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:20,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:20,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:20,707 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:20,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:20,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:20,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:20,737 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:20,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:20,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:20,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:20,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:20,738 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:21,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:21,124 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:21,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:21,124 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:21,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:21,125 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:21,125 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:21,125 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:21,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:32:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:21,315 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:21,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:21,316 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:21,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:21,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:21,316 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:21,316 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:21,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:21,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-26 21:32:21,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:21,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:21,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:21,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:21,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:21,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:21,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:21,390 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:21,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:21,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:21,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:21,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:21,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:21,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:21,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:21,414 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:21,786 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:32:21,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:21,786 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:21,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:21,787 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:32:21,787 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:32:21,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:21,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:32:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:32:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:21,974 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:21,974 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:21,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:21,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:21,975 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:32:21,975 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:21,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:21,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-26 21:32:21,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:21,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:21,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:21,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:22,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:22,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:22,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:22,078 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:22,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:22,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:22,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:22,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:22,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:22,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:22,102 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:22,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:22,440 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:22,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:22,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:22,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:22,441 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:22,441 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:22,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:22,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-26 21:32:22,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:32:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:32:22,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-26 21:32:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:22,560 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:32:22,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:32:22,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:22,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:22,560 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:22,561 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:22,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:22,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-26 21:32:22,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:22,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:22,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:22,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:22,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:22,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:22,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:22,629 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:22,642 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:22,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:22,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:22,666 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:22,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:22,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:22,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:22,667 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-26 21:32:23,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:23,083 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:23,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:23,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:23,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:23,084 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:23,084 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:23,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:23,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:32:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:23,284 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:23,285 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:23,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:23,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:23,285 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:23,285 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:23,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-26 21:32:23,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:23,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:23,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:23,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:23,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:23,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:23,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:23,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:23,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:23,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:23,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:23,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:23,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:23,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:23,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:23,383 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:23,794 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:23,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:23,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:23,794 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:23,795 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:23,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:24,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:32:24,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:24,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:24,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:24,000 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:24,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:24,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:24,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:24,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:24,001 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:24,001 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:24,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:24,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-26 21:32:24,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:24,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:24,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:24,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:24,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:24,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:24,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:24,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:24,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:24,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:24,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:24,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:24,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:24,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:24,115 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:24,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:24,551 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:24,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:24,551 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:24,552 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:24,552 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:24,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:32:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:24,774 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:24,775 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:24,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:24,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:24,775 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:24,775 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:24,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-26 21:32:24,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:24,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:24,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:24,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:24,899 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:24,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:24,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:24,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:24,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:24,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:24,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:24,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:24,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:24,940 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:25,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:25,351 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:25,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:25,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:25,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:25,352 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:25,352 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:25,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-26 21:32:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:25,546 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:25,546 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:25,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:25,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:25,547 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:25,547 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:25,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:25,547 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-26 21:32:25,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:25,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:25,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:25,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:25,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:25,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:25,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:25,617 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:25,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:25,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:25,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:25,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:25,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:25,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:25,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:25,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:25,661 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:26,116 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:32:26,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:26,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:26,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:26,117 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:32:26,117 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:32:26,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:26,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:32:26,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:32:26,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:26,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:26,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:26,341 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:26,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:26,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:26,341 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:26,341 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:26,341 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:26,342 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:26,342 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-26 21:32:26,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:26,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:26,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:26,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:26,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:26,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:26,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:26,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:26,419 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:26,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:26,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:26,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:26,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:26,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:26,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:26,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:26,443 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:26,824 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:32:26,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:26,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:26,824 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:32:26,824 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:32:26,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:26,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:32:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-26 21:32:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:27,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:27,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:27,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:27,041 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:27,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:27,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:27,042 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:27,042 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:27,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-26 21:32:27,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:27,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:27,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:27,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:27,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:27,110 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:27,119 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:27,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:27,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:27,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:27,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:27,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:27,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:27,143 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:27,510 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:27,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:27,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:27,511 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:27,511 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:27,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:27,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:32:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:27,726 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:27,726 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:27,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:27,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:27,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:27,726 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:27,726 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:27,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:27,727 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-26 21:32:27,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:27,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:27,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:27,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:27,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:27,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:27,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:27,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:27,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:27,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:27,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:27,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:27,841 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:28,195 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:32:28,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:28,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:28,196 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:32:28,196 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:32:28,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:32:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-26 21:32:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:32:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:32:28,363 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:32:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:28,364 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:32:28,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:28,364 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:32:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:28,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:28,364 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:28,364 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:28,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:28,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-26 21:32:28,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:28,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:28,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:28,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:28,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:28,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:28,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:28,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:28,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:28,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:28,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:28,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:28,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:28,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:28,464 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:32:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:28,938 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:28,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:28,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:28,938 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:28,939 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:28,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:29,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:32:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:29,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:29,176 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:29,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:29,177 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:29,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:29,177 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:29,177 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:29,177 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:29,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-26 21:32:29,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:29,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:29,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:29,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:29,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:29,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:29,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:29,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:29,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:29,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:29,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:29,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:29,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:29,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:29,316 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:30,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:30,239 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:30,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:30,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:30,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:30,240 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:30,240 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:30,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:30,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-26 21:32:30,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:30,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:30,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:30,446 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:30,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:30,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:30,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:30,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:30,447 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:30,447 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:30,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:30,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-26 21:32:30,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:30,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:30,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:30,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:30,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:30,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:30,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:30,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:30,521 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:30,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:30,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:30,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:30,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:30,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:30,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:30,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:30,544 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:30,979 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:30,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:30,979 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:30,980 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:30,980 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:30,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:31,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:32:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:31,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:31,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:31,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:31,205 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:31,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:31,206 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:31,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:31,206 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:31,206 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:31,206 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:31,206 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:31,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-26 21:32:31,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:31,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:31,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:31,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:31,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:31,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:31,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:31,287 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:31,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:31,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:31,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:31,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:31,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:31,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:31,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:31,311 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:31,721 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:32:31,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:31,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:31,721 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:32:31,721 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:32:31,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:31,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:32:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-26 21:32:31,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:31,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:31,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:31,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:31,912 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:31,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:31,912 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:31,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:31,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:31,912 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:31,912 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:31,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-26 21:32:31,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:31,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:31,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:31,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:31,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:31,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:31,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:31,993 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:31,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:31,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:31,997 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:32,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:32,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:32,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:32,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:32,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:32,028 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:32,480 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:32:32,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:32,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:32,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:32,481 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:32:32,481 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:32:32,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:32:32,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:32:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:32,693 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:32,693 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:32,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:32,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:32,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:32,693 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:32,693 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:32,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-26 21:32:32,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:32,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:32,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:32,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:32,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:33,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:33,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:33,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:33,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:33,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:33,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:33,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:33,177 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:33,563 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:32:33,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:33,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:33,563 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:32:33,563 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:32:33,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:32:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-26 21:32:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:33,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:33,787 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:33,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:33,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:33,788 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:33,788 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:33,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:33,788 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-26 21:32:33,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:33,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:33,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:33,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:33,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:33,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:33,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:33,855 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:33,860 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:33,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:33,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:33,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:33,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:33,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:33,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:33,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:33,884 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:34,245 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:34,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:34,245 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:34,245 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:34,245 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:34,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:32:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:34,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:34,475 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:34,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:34,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:34,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:34,475 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:32:34,475 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:34,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-26 21:32:34,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:34,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:34,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:34,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:34,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:34,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:34,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:34,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:34,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:34,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:34,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:34,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:34,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:34,578 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:34,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:34,929 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:32:34,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:34,929 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:34,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:34,930 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:32:34,930 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:32:34,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:32:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-26 21:32:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:32:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:32:35,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-26 21:32:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:35,096 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:32:35,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:32:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:35,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:35,097 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:35,097 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:35,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-26 21:32:35,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:35,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:35,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:35,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:35,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:35,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:35,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:35,168 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:35,173 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:35,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:35,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:35,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:35,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:35,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:35,210 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-26 21:32:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:35,701 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:35,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:35,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:35,702 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:35,702 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:35,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:35,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:35,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:32:35,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:35,918 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:35,918 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:35,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:35,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:35,919 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:35,919 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:35,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:35,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-26 21:32:35,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:35,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:35,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:35,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:35,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:35,984 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:35,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:35,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:35,992 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:36,001 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:36,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:36,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:36,024 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:36,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:36,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:36,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:36,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:36,025 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:36,411 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:36,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:36,411 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:36,412 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:36,412 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:36,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:32:36,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:36,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:36,620 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:36,620 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:36,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:36,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:36,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:36,620 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:36,621 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:36,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-26 21:32:36,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:36,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:36,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:36,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:36,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:36,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:36,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:36,704 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:36,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:36,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:36,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:36,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:36,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:36,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:36,737 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:37,108 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:32:37,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:37,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:37,109 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:32:37,109 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:32:37,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:32:37,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-26 21:32:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:37,335 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:37,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:37,335 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:37,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:37,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:37,336 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:37,336 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:37,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:37,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-26 21:32:37,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:37,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:37,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:37,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:37,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:37,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:37,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:37,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:37,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:37,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:37,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:37,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:37,439 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:37,858 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:32:37,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:37,858 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:37,859 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:32:37,859 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:32:37,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:37,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:32:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-26 21:32:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:38,071 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:38,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:38,072 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:38,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:38,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:38,072 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:38,072 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:38,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:38,072 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-26 21:32:38,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:38,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:38,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:38,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:38,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:38,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:38,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:38,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:38,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:38,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:38,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:38,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:38,167 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:38,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:38,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:38,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:38,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:38,168 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:38,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:38,558 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:38,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:38,558 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:38,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:38,558 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:38,558 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:38,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-26 21:32:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:38,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:38,787 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:38,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:38,787 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:38,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:38,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:38,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:38,788 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:38,788 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:38,788 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:38,788 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-26 21:32:38,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:38,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:38,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:38,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:38,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:38,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:38,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:38,863 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:38,883 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:38,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:38,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:38,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:38,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:38,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:38,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:38,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:38,908 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:39,281 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:32:39,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:39,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:39,281 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:32:39,281 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:32:39,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:39,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:32:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-26 21:32:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:39,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:39,512 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:39,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:39,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:39,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:39,512 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:39,512 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:39,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-26 21:32:39,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:39,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:39,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:39,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:39,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:39,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:39,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:39,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:39,593 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:39,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:39,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:39,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:39,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:39,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:39,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:39,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:39,617 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:39,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:40,000 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:32:40,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:40,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:40,000 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:32:40,000 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:32:40,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:32:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-26 21:32:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:40,238 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:40,238 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:40,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:40,238 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:40,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:40,239 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:32:40,239 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:40,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-26 21:32:40,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:40,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:40,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:40,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:40,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:40,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:40,310 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:40,319 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:40,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:40,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:40,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:40,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:40,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:40,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:40,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:40,344 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:40,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:40,715 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:32:40,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:40,715 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:40,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:40,715 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:32:40,715 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:32:40,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:40,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:32:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-26 21:32:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:32:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:32:40,895 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-26 21:32:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:40,895 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:32:40,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:32:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:40,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:40,896 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-26 21:32:40,896 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:40,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-26 21:32:40,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:40,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:40,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:40,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:40,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:40,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:40,966 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:40,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:40,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:40,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:41,001 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:41,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:41,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:41,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:41,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:41,002 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-26 21:32:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:41,360 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:32:41,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:41,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:41,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:41,361 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:32:41,361 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:32:41,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:32:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-26 21:32:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:41,582 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:41,582 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:41,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:41,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:41,583 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:41,583 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:41,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:41,583 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-26 21:32:41,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:41,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:41,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:41,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:41,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:41,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:41,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:41,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:41,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:41,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:41,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:41,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:41,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:41,681 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:42,026 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:32:42,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:42,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:42,026 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:32:42,026 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:32:42,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:32:42,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-26 21:32:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:42,246 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:42,246 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:42,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:42,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:42,246 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:42,246 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:42,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:42,246 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-26 21:32:42,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:42,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:42,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:42,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:42,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:42,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:42,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:42,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:42,343 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:42,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:42,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:42,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:42,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:42,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:42,379 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:42,832 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:32:42,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:42,832 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:42,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:42,833 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:32:42,833 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:32:42,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:32:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-26 21:32:43,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:43,067 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:43,068 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:43,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:43,068 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:43,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:43,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:43,068 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:32:43,068 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:43,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-26 21:32:43,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:43,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:43,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:43,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:43,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:43,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:43,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:43,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:43,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:43,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-26 21:32:43,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:43,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:43,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:43,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:43,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:43,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:43,172 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:43,509 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:32:43,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:43,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:43,510 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:32:43,510 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:32:43,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:43,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:32:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-26 21:32:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:43,722 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-26 21:32:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:43,722 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:43,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:43,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:43,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:43,722 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-26 21:32:43,722 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:43,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:43,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-26 21:32:43,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:43,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:43,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:43,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:43,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:43,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:43,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:43,795 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:43,801 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:43,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:43,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:43,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:43,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:43,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:43,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:43,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:43,825 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-26 21:32:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:44,138 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:32:44,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:44,138 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:44,139 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:32:44,139 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:32:44,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:44,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:32:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-26 21:32:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:44,380 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:44,380 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:44,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:44,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:44,381 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:32:44,381 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:44,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:44,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-26 21:32:44,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:44,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:44,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:44,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:44,497 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:44,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:44,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:44,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:44,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-26 21:32:44,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:44,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:44,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:44,539 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:44,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:44,540 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:44,866 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:32:44,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:44,866 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:44,867 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:32:44,867 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:32:44,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:44,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:32:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-26 21:32:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:45,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:45,092 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-26 21:32:45,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:45,092 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:45,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:45,093 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:45,093 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-26 21:32:45,093 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:45,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:45,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-26 21:32:45,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:45,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:45,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:45,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:45,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:45,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:45,155 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:45,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:45,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:45,174 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:32:45,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:45,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:45,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:45,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:45,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:45,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:45,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:45,197 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-26 21:32:45,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:45,526 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-26 21:32:45,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:45,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:45,526 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:32:45,526 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:32:45,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:45,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:32:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-26 21:32:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:45,755 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-26 21:32:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:45,755 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:45,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:32:45,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:45,756 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-26 21:32:45,756 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:45,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:45,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-26 21:32:45,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:45,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:45,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:45,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:45,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:46,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:46,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:46,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:46,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:46,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:46,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:32:46,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:32:46,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:32:46,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:46,347 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-26 21:32:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:46,709 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-26 21:32:46,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:32:46,709 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-26 21:32:46,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:46,710 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:32:46,710 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:32:46,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:32:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:32:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-26 21:32:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:32:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-26 21:32:46,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-26 21:32:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:46,851 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-26 21:32:46,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:32:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-26 21:32:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:46,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:46,852 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-26 21:32:46,852 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:46,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:46,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-26 21:32:46,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:46,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:46,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:46,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:46,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:46,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:46,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:46,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:46,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:46,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:46,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:46,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:46,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:46,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:46,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:46,982 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-26 21:32:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:47,595 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:32:47,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:47,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:47,596 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:32:47,596 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:32:47,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:32:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:32:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:32:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:32:47,897 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:32:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:47,897 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:32:47,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:32:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:47,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:47,898 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:32:47,898 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:47,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-26 21:32:47,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:47,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:47,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:47,900 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:47,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:47,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:47,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:47,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:47,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:47,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:48,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:48,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:48,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:48,015 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:32:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:48,610 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:32:48,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:48,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:48,611 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:32:48,611 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:32:48,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:48,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:32:48,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:32:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:48,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:48,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:32:48,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:48,897 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:48,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:48,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:48,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:48,898 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:32:48,898 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:48,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-26 21:32:48,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:48,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:48,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:48,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:48,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:48,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:48,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:48,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:48,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:48,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:48,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:49,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:49,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:49,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:49,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:49,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:49,008 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:32:49,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:49,604 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:49,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:49,604 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:49,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:49,604 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:49,604 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:49,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:49,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:32:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:32:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:32:49,886 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:32:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:49,886 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:32:49,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:32:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:49,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:49,886 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:32:49,887 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:49,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:49,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-26 21:32:49,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:49,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:49,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:49,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:49,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:49,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:49,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:49,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:49,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:32:49,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:49,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:49,978 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:49,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:49,998 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:49,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:49,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:49,999 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:32:50,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:50,546 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:50,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:50,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:50,546 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:50,546 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:50,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:50,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 21:32:50,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:50,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:32:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:50,813 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:50,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:50,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:50,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:50,813 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:32:50,813 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:50,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:50,813 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-26 21:32:50,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:50,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:50,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:50,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:50,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:50,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:50,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:50,888 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:50,894 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:50,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:50,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:50,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:50,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:50,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:50,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:50,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:50,917 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:32:51,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:51,535 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:32:51,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:51,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:51,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:51,535 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:32:51,535 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:32:51,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:32:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:32:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:32:51,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:32:51,821 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:32:51,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:51,822 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:32:51,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:51,822 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:32:51,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:51,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:51,822 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:32:51,822 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:51,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-26 21:32:51,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:51,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:51,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:51,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:51,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:51,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:51,893 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:51,900 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:51,910 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:32:51,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:51,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:51,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:51,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:51,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:51,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:51,935 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:32:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:52,564 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:32:52,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:52,564 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:52,565 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:32:52,565 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:32:52,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:32:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:32:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:52,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:32:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:52,844 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:52,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:52,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:52,844 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:32:52,845 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:52,845 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:52,845 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-26 21:32:52,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:52,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:52,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:52,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:52,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:52,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:52,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:52,925 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:52,936 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:32:52,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:52,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:52,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:52,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:52,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:52,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:52,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:52,959 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:32:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:53,551 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:32:53,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:53,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:53,552 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:32:53,552 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:32:53,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:32:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:32:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:32:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:32:53,847 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:32:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:53,847 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:32:53,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:32:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:53,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:53,847 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:32:53,848 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:53,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-26 21:32:53,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:53,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:53,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:53,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:53,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:53,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:53,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:53,928 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:53,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:53,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:53,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:53,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:53,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:53,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:53,958 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:32:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:54,514 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:54,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:54,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:54,514 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:54,515 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:54,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 21:32:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:32:54,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:32:54,773 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:32:54,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:54,773 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:32:54,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:54,773 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:32:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:54,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:54,773 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:32:54,773 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:54,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:54,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-26 21:32:54,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:54,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:54,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:54,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:54,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:54,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:54,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:54,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:32:54,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:32:54,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:54,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:54,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:54,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:54,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:54,917 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:32:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:55,474 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:55,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:55,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:55,474 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:55,474 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:55,474 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:55,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:32:55,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:32:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:32:55,762 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:32:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:55,762 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:32:55,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:32:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:55,763 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:55,763 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:32:55,763 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:55,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-26 21:32:55,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:55,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:55,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:55,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:55,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:55,836 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:55,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:55,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:55,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:32:55,854 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:32:55,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:55,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:55,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:55,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:55,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:55,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:55,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:55,888 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:32:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:56,453 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:56,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:56,453 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:56,454 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:56,454 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:56,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:32:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:32:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:32:56,734 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:32:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:56,734 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:32:56,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:32:56,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:56,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:56,735 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:32:56,735 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:56,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:56,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-26 21:32:56,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:56,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:56,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:56,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:56,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:56,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:56,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:32:56,819 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:32:56,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:56,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:56,841 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:56,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:56,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:56,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:56,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:56,842 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:32:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:57,421 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:32:57,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:57,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:57,422 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:32:57,422 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:32:57,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:32:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:32:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:32:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:32:57,699 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:32:57,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:57,700 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:32:57,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:32:57,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:57,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:57,700 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:32:57,700 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:57,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-26 21:32:57,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:57,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:57,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:57,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:57,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:57,796 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:57,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:57,807 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:32:57,816 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:32:57,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:57,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:57,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:57,841 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:57,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:57,841 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:32:58,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:58,379 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:32:58,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:58,379 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:58,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:58,379 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:32:58,379 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:32:58,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:32:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-26 21:32:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:32:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:32:58,665 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:32:58,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:58,665 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:32:58,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:58,665 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:32:58,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:58,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:58,666 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:32:58,666 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:58,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-26 21:32:58,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:58,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:58,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:58,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:58,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:58,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:58,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:58,747 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:32:58,758 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:32:58,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:32:58,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:58,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:58,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:58,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:58,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:58,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:58,782 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:32:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:32:59,321 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:32:59,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:32:59,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:32:59,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:32:59,322 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:32:59,322 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:32:59,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:32:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-26 21:32:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:32:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:32:59,637 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:32:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:32:59,637 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:32:59,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:32:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:32:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:32:59,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:32:59,638 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:32:59,638 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:32:59,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:32:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-26 21:32:59,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:32:59,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:32:59,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:59,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:32:59,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:32:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:59,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:32:59,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:32:59,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:32:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:32:59,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:32:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:32:59,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:32:59,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:32:59,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:32:59,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:32:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:32:59,748 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:00,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:00,254 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:33:00,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:00,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:00,255 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:33:00,255 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:33:00,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:33:00,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:33:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:00,550 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:00,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:00,550 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:00,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:00,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:00,551 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:00,551 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:00,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:00,551 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-26 21:33:00,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:00,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:00,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:00,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:00,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:00,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:00,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:00,626 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:00,634 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:00,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:00,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:00,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:00,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:00,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:00,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:00,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:00,668 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:01,180 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:33:01,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:01,180 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:01,181 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:33:01,181 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:33:01,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:33:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:33:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:01,493 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:01,494 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:01,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:01,494 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:01,494 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:01,494 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:01,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:01,494 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-26 21:33:01,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:01,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:01,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:01,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:01,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:01,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:01,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:01,573 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:01,583 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:01,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:01,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:01,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:01,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:01,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:01,609 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:02,110 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:02,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:02,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:02,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:02,111 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:02,111 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:02,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:02,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:33:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:33:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:33:02,417 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-26 21:33:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:02,417 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:33:02,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:33:02,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:02,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:02,417 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:33:02,418 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:02,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:02,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-26 21:33:02,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:02,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:02,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:02,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:02,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:02,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:02,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:02,514 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:02,521 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:02,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:02,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:02,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:02,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:02,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:02,544 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-26 21:33:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:03,193 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:03,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:03,193 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:03,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:03,194 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:03,194 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:03,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:03,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:33:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:03,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:03,490 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:03,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:03,490 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:03,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:03,491 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:03,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:03,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:03,491 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:03,491 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:03,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:03,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-26 21:33:03,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:03,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:03,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:03,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:03,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:03,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:03,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:03,574 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:03,584 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:03,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:03,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:03,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:03,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:03,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:03,609 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:04,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:04,238 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:04,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:04,238 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:04,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:04,238 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:04,238 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:04,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:33:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:04,529 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:04,529 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:04,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:04,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:04,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:04,529 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:04,529 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:04,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-26 21:33:04,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:04,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:04,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:04,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:04,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:04,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:04,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:04,620 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:04,637 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:04,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:04,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:04,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:04,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:04,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:04,660 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:05,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:05,264 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:33:05,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:05,264 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:05,264 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:33:05,264 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:33:05,264 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:33:05,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:33:05,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:05,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:05,554 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:05,554 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:05,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:05,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:05,555 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:05,555 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:05,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:05,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-26 21:33:05,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:05,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:05,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:05,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:05,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:05,626 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:05,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:05,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:05,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:05,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:05,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:05,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:05,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:05,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:05,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:05,665 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:06,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:06,267 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:33:06,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:06,267 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:06,268 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:33:06,268 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:33:06,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:33:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 21:33:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:33:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:33:06,543 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:33:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:06,543 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:33:06,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:33:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:06,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:06,543 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:06,543 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:06,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:06,543 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-26 21:33:06,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:06,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:06,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:06,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:06,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:06,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:06,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:06,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:06,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:06,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:06,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:06,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:06,652 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:06,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:06,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:06,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:06,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:06,652 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:33:07,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:07,312 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:07,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:07,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:07,313 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:07,313 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:07,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:07,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:33:07,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:07,611 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:07,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:07,611 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:07,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:07,611 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:07,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:07,611 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:07,611 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:07,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-26 21:33:07,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:07,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:07,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:07,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:07,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:07,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:07,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:07,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:07,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:07,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:07,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:07,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:07,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:07,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:07,742 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:08,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:08,418 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:08,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:08,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:08,419 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:08,419 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:08,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:08,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:08,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:33:08,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:08,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:08,722 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:08,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:08,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:08,722 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:08,722 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:08,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-26 21:33:08,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:08,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:08,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:08,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,795 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:08,795 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:08,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:08,808 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:08,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:08,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:08,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:08,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:08,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:08,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:08,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:08,831 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:09,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:09,449 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:33:09,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:09,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:09,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:09,450 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:33:09,450 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:33:09,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:09,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:33:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:33:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:09,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:09,774 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:09,774 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:09,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:09,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:09,775 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:09,775 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:09,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:09,775 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-26 21:33:09,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:09,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:09,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:09,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:09,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:09,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:09,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:09,871 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:09,882 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:09,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:09,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:09,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:09,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:09,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:09,906 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:10,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:10,502 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:33:10,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:10,502 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:10,503 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:33:10,503 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:33:10,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:10,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:33:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 21:33:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:33:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:33:10,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:33:10,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:10,776 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:33:10,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:33:10,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:10,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:10,777 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:10,777 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:10,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:10,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-26 21:33:10,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:10,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:10,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:10,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:10,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:10,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:10,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:10,855 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:10,868 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:10,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:10,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:10,891 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:10,892 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:10,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:10,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:10,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:10,892 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:33:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:11,492 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:33:11,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:11,492 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:11,493 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:33:11,493 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:33:11,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:33:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:33:11,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:11,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:11,822 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:11,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:11,822 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:11,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:11,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:11,823 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:11,823 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:11,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:11,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-26 21:33:11,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:11,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:11,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:11,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:11,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:12,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:12,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:12,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:12,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:12,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:12,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:12,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:12,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:12,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:12,204 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:12,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:12,783 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:33:12,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:12,783 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:12,783 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:33:12,783 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:33:12,783 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:33:13,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:33:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:13,068 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:13,068 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:13,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:13,068 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:13,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:13,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:13,068 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:13,068 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:13,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:13,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-26 21:33:13,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:13,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:13,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:13,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:13,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:13,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:13,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:13,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:13,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:13,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:13,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:13,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:13,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:13,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:13,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:13,181 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:13,766 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:33:13,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:13,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:13,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:13,767 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:33:13,767 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:33:13,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:33:14,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:33:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:14,064 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:14,064 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:14,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:14,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:14,064 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:14,064 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:14,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:14,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-26 21:33:14,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:14,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:14,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:14,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:14,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:14,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:14,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:14,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:14,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:14,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:14,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:14,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:14,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:14,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:14,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:14,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:14,190 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:14,865 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:33:14,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:14,865 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:14,866 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:33:14,866 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:33:14,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:14,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:33:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-26 21:33:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:33:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:33:15,144 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:33:15,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:15,144 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:33:15,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:15,144 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:33:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:15,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:15,144 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:15,144 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:15,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-26 21:33:15,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:15,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:15,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:15,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:15,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:15,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:15,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:15,280 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:15,286 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:15,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:15,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:15,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:15,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:15,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:15,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:15,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:15,310 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:33:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:15,869 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:33:15,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:15,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:15,870 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:33:15,870 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:33:15,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:33:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-26 21:33:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:16,174 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:16,174 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:16,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:16,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:16,175 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:16,175 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:16,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:16,175 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-26 21:33:16,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:16,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:16,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:16,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:16,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:16,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:16,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:16,253 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:16,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:16,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:16,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:16,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:16,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:16,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:16,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:16,290 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:16,816 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:33:16,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:16,816 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:16,817 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:33:16,817 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:33:16,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:33:17,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:33:17,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:17,106 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:17,106 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:17,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:17,106 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:17,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:17,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:17,106 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:17,106 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:17,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-26 21:33:17,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:17,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:17,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:17,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:17,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:17,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:17,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:17,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:17,186 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:17,197 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:17,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:17,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:17,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:17,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:17,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:17,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:17,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:17,221 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:17,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:17,758 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:33:17,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:17,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:17,759 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:33:17,759 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:33:17,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:17,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:33:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:33:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:18,063 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:18,063 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:18,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:18,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:18,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:18,063 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:18,063 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:18,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-26 21:33:18,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:18,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:18,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:18,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:18,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:18,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:18,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:18,140 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:18,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:18,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:18,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:18,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:18,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:18,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:18,169 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:18,674 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:18,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:18,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:18,675 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:18,675 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:18,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:18,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-26 21:33:18,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:33:18,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:33:18,894 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-26 21:33:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:18,894 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:33:18,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:33:18,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:18,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:18,895 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:33:18,895 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:18,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-26 21:33:18,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:18,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:18,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:18,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:18,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:18,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:18,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:18,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:18,983 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:18,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:18,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:19,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:19,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:19,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:19,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:19,005 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-26 21:33:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:19,612 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:33:19,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:19,612 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:19,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:19,612 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:33:19,612 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:33:19,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:33:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:33:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:19,952 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:19,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:19,952 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:19,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:19,953 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:19,953 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:19,953 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:19,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-26 21:33:19,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:19,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:19,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:19,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:19,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:20,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:20,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:20,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:20,082 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:20,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:20,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:20,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:20,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:20,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:20,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:20,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:20,116 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:20,715 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:33:20,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:20,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:20,716 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:33:20,716 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:33:20,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:20,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:33:21,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:33:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:21,055 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:21,055 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:21,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:21,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:21,056 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:21,056 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:21,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-26 21:33:21,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:21,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:21,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:21,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:21,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:21,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:21,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:21,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:21,140 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:21,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:21,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:21,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:21,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:21,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:21,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:21,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:21,164 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:21,774 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:33:21,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:21,774 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:21,775 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:33:21,775 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:33:21,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:21,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:33:22,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:33:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:22,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:22,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:22,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:22,124 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:22,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:22,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:22,125 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:22,125 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:22,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:22,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-26 21:33:22,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:22,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:22,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:22,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:22,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:22,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:22,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:22,201 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:22,211 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:22,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:22,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:22,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:22,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:22,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:22,236 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:22,834 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:33:22,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:22,834 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:22,835 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:33:22,835 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:33:22,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:22,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:33:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:33:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:33:23,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:33:23,131 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:33:23,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:23,131 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:33:23,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:23,131 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:33:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:23,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:23,131 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:23,132 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:23,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:23,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-26 21:33:23,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:23,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:23,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:23,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:23,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:23,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:23,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:23,209 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:23,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:23,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:23,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:23,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:23,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:23,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:23,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:23,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:23,242 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:33:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:23,792 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:33:23,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:23,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:23,792 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:33:23,792 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:33:23,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:33:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:33:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:24,118 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:24,118 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:24,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:24,118 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:24,118 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:24,118 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:24,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-26 21:33:24,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:24,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:24,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:24,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:24,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:24,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:24,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:24,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:24,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:24,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:24,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:24,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:24,229 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:24,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:24,786 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:33:24,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:24,786 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:24,786 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:33:24,787 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:33:24,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:24,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:33:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:33:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:25,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:25,213 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:25,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:25,213 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:25,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:25,213 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:25,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:25,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:25,213 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:25,214 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:25,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:25,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-26 21:33:25,214 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:25,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:25,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:25,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:25,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:25,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:25,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:25,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:25,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:25,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:25,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:25,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:25,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:25,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:25,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:25,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:25,328 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:25,855 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:25,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:25,855 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:25,856 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:25,856 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:25,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:33:26,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:26,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:26,208 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:26,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:26,208 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:26,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:26,208 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:26,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:26,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:26,209 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:26,209 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:26,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-26 21:33:26,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:26,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:26,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:26,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:26,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:26,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:26,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:26,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:26,297 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:26,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:26,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:26,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:26,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:26,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:26,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:26,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:26,322 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:26,840 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:33:26,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:26,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:26,841 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:33:26,841 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:33:26,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:33:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:33:27,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:33:27,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:33:27,111 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:33:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:27,111 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:33:27,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:27,112 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:33:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:27,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:27,112 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:27,112 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:27,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:27,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-26 21:33:27,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:27,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:27,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:27,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:27,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:27,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:27,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:27,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:27,195 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:27,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:27,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:27,218 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:27,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:27,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:27,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:27,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:27,218 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:33:27,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:27,842 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:33:27,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:27,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:27,843 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:33:27,843 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:33:27,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:33:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:33:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:28,198 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:28,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:28,198 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:28,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:28,199 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:28,199 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:28,199 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:28,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:28,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-26 21:33:28,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:28,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:28,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:28,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:28,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:28,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:28,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:28,285 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:28,295 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:28,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:28,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:28,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:28,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:28,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:28,321 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:28,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:28,911 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:33:28,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:28,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:28,911 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:33:28,912 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:33:28,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:33:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:33:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:29,256 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:29,256 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:29,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:29,256 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:29,256 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:29,256 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:29,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:29,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-26 21:33:29,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:29,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:29,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:29,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:29,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:29,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:29,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:29,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:29,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:29,352 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:29,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:29,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:29,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:29,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:29,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:29,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:29,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:29,386 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:30,688 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:33:30,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:30,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:30,688 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:33:30,688 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:33:30,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:33:31,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:33:31,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:31,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:31,008 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:31,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:31,008 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:31,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:31,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:31,008 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:31,009 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:31,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-26 21:33:31,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:31,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:31,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:31,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:31,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:31,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:31,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:31,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:31,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:31,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:31,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:31,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:31,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:31,113 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:31,714 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:33:31,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:31,714 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:31,715 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:33:31,715 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:33:31,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:33:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:33:32,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:33:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:33:32,150 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:33:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:32,150 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:33:32,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:33:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:32,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:32,150 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:32,151 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:32,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-26 21:33:32,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:32,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:32,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:32,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:32,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:32,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:32,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:32,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:32,237 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:32,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:32,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:32,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:32,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:32,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:32,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:32,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:32,262 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:33:32,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:32,840 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:33:32,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:32,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:32,841 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:33:32,841 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:33:32,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:33:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:33:33,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:33,191 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:33,191 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:33,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:33,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:33,192 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:33,192 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:33,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:33,192 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-26 21:33:33,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:33,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:33,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:33,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:33,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:33,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:33,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:33,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:33,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:33,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:33,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:33,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:33,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:33,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:33,298 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:33,863 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:33:33,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:33,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:33,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:33,863 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:33:33,863 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:33:33,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:33,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:33:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:33:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:34,180 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:34,180 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:34,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:34,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:34,180 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:34,180 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:34,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:34,181 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-26 21:33:34,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:34,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:34,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:34,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:34,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:34,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:34,247 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:34,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:34,256 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:34,261 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:34,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:34,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:34,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:34,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:34,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:34,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:34,285 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:34,833 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:34,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:34,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:34,834 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:34,834 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:34,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:34,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:33:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:35,188 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:35,188 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:35,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:35,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:35,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:35,188 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:35,189 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:35,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:35,189 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-26 21:33:35,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:35,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:35,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:35,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:35,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:35,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:35,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:35,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:35,269 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:35,279 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:35,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:35,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:35,303 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:35,303 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:35,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:35,304 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:35,814 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:33:35,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:35,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:35,814 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:33:35,814 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:33:35,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:33:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-26 21:33:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:33:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:33:36,081 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-26 21:33:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:36,081 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:33:36,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:36,081 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:33:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:36,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:36,081 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:36,082 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:36,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-26 21:33:36,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:36,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:36,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:36,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:36,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:36,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:36,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:36,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:36,174 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:36,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:36,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:36,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:36,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:36,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:36,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:36,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:36,198 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-26 21:33:36,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:36,741 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:36,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:36,741 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:36,742 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:36,742 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:36,742 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:33:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:37,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:37,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:37,072 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:37,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:37,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:37,072 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:37,072 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:37,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-26 21:33:37,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:37,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:37,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:37,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:37,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:37,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:37,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:37,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:37,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:37,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:37,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:37,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:37,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:37,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:37,179 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:37,728 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:37,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:37,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:37,728 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:37,728 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:37,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:33:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:38,087 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:38,087 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:38,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:38,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:38,087 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:38,087 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:38,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-26 21:33:38,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:38,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:38,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:38,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:38,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:38,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:38,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:38,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:38,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:38,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:38,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:38,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:38,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:38,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:38,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:38,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:38,197 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:38,717 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:33:38,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:38,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:38,718 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:33:38,718 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:33:38,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:33:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-26 21:33:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:39,057 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:39,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:39,057 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:39,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:39,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:39,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:39,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:39,058 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:39,058 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:39,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:39,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-26 21:33:39,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:39,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:39,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:39,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:39,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:39,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:39,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:39,133 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:39,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:39,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:39,144 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:39,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:39,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:39,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:39,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:39,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:39,167 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:39,672 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:33:39,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:39,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:39,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:39,672 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:33:39,672 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:33:39,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:33:39,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:33:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:33:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:33:39,991 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:33:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:39,991 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:33:39,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:33:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:39,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:39,991 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:39,991 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:39,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:39,992 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-26 21:33:39,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:39,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:39,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:39,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:39,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:40,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:40,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:40,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:40,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:40,075 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:40,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:40,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:40,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:40,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:40,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:40,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:40,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:40,110 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:33:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:40,669 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:40,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:40,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:40,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:40,669 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:40,669 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:40,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:33:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:41,035 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:41,035 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:41,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:41,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:41,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:41,036 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:41,036 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:41,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-26 21:33:41,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:41,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:41,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:41,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:41,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:41,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:41,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:41,113 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:41,123 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:41,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:41,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:41,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:41,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:41,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:41,146 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:41,696 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:33:41,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:41,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:41,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:41,697 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:33:41,697 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:33:41,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:33:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:33:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:42,058 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:42,058 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:42,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:42,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:42,058 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:42,058 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:42,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-26 21:33:42,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:42,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:42,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:42,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:42,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:42,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:42,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:42,137 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:42,153 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:42,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:42,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:42,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:42,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:42,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:42,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:42,177 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:42,682 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:33:42,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:42,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:42,683 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:33:42,683 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:33:42,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:33:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-26 21:33:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:43,048 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:43,048 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:43,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:43,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:43,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:43,048 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:43,048 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:43,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-26 21:33:43,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:43,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:43,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:43,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:43,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:43,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:43,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:43,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:43,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:43,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:43,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:43,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:43,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:43,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:43,156 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:43,646 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:33:43,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:43,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:43,647 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:33:43,647 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:33:43,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:33:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:33:43,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:33:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:33:43,928 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:33:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:43,929 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:33:43,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:33:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:43,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:43,929 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:43,929 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:43,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-26 21:33:43,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:43,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:43,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:43,930 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:43,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:44,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:44,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:44,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:44,252 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:44,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:44,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:44,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:44,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:44,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:44,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:44,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:44,276 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:33:44,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:44,766 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:33:44,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:44,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:44,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:44,767 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:33:44,767 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:33:44,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:33:45,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-26 21:33:45,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:45,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:45,105 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:45,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:45,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:45,106 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:45,106 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:45,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-26 21:33:45,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:45,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:45,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:45,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:45,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:45,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:45,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:45,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:45,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:45,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:45,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:45,216 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:45,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:45,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:45,216 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:45,692 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:33:45,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:45,692 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:45,692 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:33:45,692 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:33:45,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:45,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:33:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-26 21:33:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:46,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:46,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:46,053 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:46,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:46,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:46,054 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:46,054 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:46,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:46,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-26 21:33:46,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:46,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:46,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:46,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:46,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:46,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:46,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:46,135 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:46,141 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:46,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:46,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:46,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:46,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:46,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:46,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:46,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:46,177 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:46,735 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:33:46,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:46,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:46,736 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:33:46,736 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:33:46,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:46,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:33:47,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-26 21:33:47,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:47,107 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:47,108 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:47,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:47,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:47,108 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:47,108 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:47,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:47,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-26 21:33:47,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:47,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:47,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:47,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:47,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:47,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:47,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:47,193 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:47,203 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:47,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:47,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:47,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:47,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:47,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:47,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:47,227 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:47,722 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:33:47,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:47,722 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:47,722 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:33:47,722 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:33:47,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:33:48,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-26 21:33:48,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:33:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:33:48,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:33:48,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:48,042 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:33:48,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:33:48,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:48,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:48,042 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:33:48,042 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:48,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:48,042 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-26 21:33:48,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:48,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:48,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:48,043 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:48,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:48,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:48,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:48,120 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:48,131 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:48,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:48,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:48,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:48,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:48,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:48,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:48,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:48,161 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:33:48,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:48,615 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:33:48,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:48,615 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:48,616 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:33:48,616 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:33:48,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:33:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-26 21:33:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:48,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:48,962 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:48,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:48,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:48,963 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:48,963 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:48,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:48,963 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-26 21:33:48,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:48,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:48,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:48,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:48,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:48,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:49,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:49,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:49,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:49,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:49,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:49,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:49,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:49,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:49,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:49,069 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:49,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:49,538 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-26 21:33:49,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:49,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:49,539 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:33:49,539 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:33:49,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:49,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:33:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-26 21:33:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:49,868 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:49,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:49,868 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:49,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:49,868 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:49,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:49,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:49,868 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:49,868 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:49,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-26 21:33:49,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:49,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:49,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:49,869 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:49,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:49,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:49,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:49,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:49,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:49,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:49,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:49,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:49,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:49,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:49,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:49,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:49,979 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:50,426 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-26 21:33:50,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:50,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:50,427 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:33:50,427 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:33:50,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:33:50,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-26 21:33:50,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:50,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:50,791 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:50,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:50,791 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:50,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:50,791 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:50,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:50,791 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:50,791 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:50,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:50,791 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-26 21:33:50,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:50,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:50,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:50,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:50,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:51,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:51,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:51,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:51,028 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:51,028 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:51,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:51,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:51,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:51,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:51,051 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:51,470 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-26 21:33:51,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:51,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:51,470 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:33:51,470 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:33:51,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:51,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:33:51,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-26 21:33:51,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:33:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-26 21:33:51,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-26 21:33:51,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:51,686 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-26 21:33:51,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:51,686 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-26 21:33:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:51,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:51,687 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-26 21:33:51,687 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:51,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:51,687 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-26 21:33:51,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:51,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:51,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:51,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:51,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:51,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:51,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:51,789 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:51,817 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:51,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:51,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:51,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:51,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:51,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:51,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:51,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:51,855 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-26 21:33:52,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:52,825 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:52,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:52,825 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:52,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:52,826 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:52,826 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:52,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:52,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:53,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:33:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:53,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:53,244 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:53,244 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:53,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:53,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:53,245 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:53,245 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:53,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:53,245 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-26 21:33:53,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:53,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:53,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:53,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:53,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:53,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:53,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:53,326 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:33:53,336 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:33:53,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:53,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:53,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:53,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:53,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:53,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:53,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:53,361 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:54,168 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:54,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:54,168 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:54,169 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:54,169 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:54,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:54,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:33:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:54,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:54,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:54,541 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:54,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:54,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:54,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:54,542 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:54,542 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:54,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-26 21:33:54,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:54,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:54,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:54,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:54,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:54,613 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:54,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:54,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:54,621 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:33:54,631 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:33:54,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:54,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:54,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:54,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:54,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:54,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:54,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:54,655 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:33:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:55,420 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:33:55,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:55,420 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:55,420 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:33:55,420 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:33:55,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:55,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:33:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:33:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:55,801 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:55,801 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:55,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:55,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:55,802 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:55,802 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:55,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:55,802 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-26 21:33:55,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:55,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:55,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:55,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:55,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:55,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:55,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:55,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:55,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:55,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:55,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:55,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:55,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:55,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:55,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:55,997 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:56,703 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:33:56,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:56,703 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:56,704 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:33:56,704 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:33:56,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:56,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:33:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 21:33:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:33:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:33:57,064 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:33:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:57,064 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:33:57,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:33:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:57,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:57,064 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:33:57,064 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:57,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-26 21:33:57,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:57,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:57,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:57,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:33:57,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:57,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:57,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:57,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:33:57,148 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:33:57,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:57,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:57,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:57,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:57,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:57,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:57,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:57,172 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:33:57,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:57,968 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:57,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:57,968 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:57,969 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:57,969 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:57,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:33:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:33:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:33:58,511 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:33:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:58,511 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:33:58,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:33:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:58,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:58,512 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:58,512 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:58,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-26 21:33:58,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:58,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:58,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:58,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:58,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:58,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:58,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:33:58,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:33:58,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:58,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:58,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:58,637 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:58,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:58,637 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:33:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:33:59,458 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:33:59,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:33:59,458 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:33:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:33:59,459 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:33:59,459 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:33:59,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:33:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:33:59,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:33:59,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:33:59,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:33:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:33:59,830 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:33:59,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:33:59,831 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:33:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:33:59,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:33:59,831 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:33:59,831 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:33:59,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:33:59,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-26 21:33:59,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:33:59,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:33:59,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:59,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:33:59,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:33:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:33:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:59,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:33:59,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:33:59,907 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:33:59,913 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:33:59,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:33:59,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:33:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:33:59,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:33:59,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:33:59,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:33:59,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:33:59,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:33:59,936 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:00,730 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:34:00,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:00,730 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:00,730 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:34:00,731 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:34:00,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:34:01,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:34:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:01,154 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:01,154 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:01,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:01,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:01,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:01,155 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:01,155 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:01,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:01,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-26 21:34:01,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:01,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:01,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:01,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:01,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:01,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:01,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:01,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:01,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:01,233 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:01,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:01,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:01,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:01,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:01,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:01,266 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:02,158 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:34:02,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:02,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:02,159 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:02,159 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:02,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:02,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 21:34:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:34:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:34:02,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:34:02,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:02,482 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:34:02,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:02,482 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:34:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:02,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:02,482 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:34:02,482 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:02,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:02,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-26 21:34:02,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:02,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:02,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:02,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:02,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:02,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:02,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:02,561 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:02,570 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:02,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:02,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:02,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:02,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:02,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:02,596 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:34:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:03,340 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:34:03,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:03,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:03,341 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:03,341 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:03,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:34:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:03,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:03,725 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:03,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:03,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:03,725 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:03,725 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:03,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:03,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-26 21:34:03,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:03,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:03,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:03,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:03,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:03,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:03,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:03,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:03,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:03,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:03,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:03,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:03,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:03,850 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:04,538 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:04,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:04,538 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:04,538 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:04,539 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:04,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:34:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:04,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:04,913 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:04,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:04,913 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:04,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:04,914 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:04,914 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:04,914 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:04,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:04,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-26 21:34:04,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:04,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:04,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:04,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:04,981 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:04,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:04,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:04,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:04,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:04,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:04,999 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:05,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:05,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:05,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:05,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:05,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:05,020 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:05,767 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:34:05,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:05,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:05,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:05,768 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:05,768 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:05,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:34:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:06,171 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:06,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:06,171 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:06,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:06,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:06,172 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:06,172 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:06,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-26 21:34:06,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:06,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:06,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:06,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:06,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:06,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:06,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:06,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:06,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:06,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:06,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:06,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:06,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:06,300 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:07,006 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:07,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:07,006 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:07,007 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:07,007 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:07,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:07,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-26 21:34:07,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:07,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:34:07,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:34:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:07,390 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:34:07,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:34:07,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:07,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:07,390 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:07,390 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:07,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:07,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-26 21:34:07,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:07,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:07,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:07,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:07,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:07,470 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:07,476 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:07,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:07,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:07,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:07,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:07,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:07,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:07,501 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:34:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:08,170 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:08,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:08,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:08,171 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:08,171 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:08,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-26 21:34:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:08,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:08,572 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:08,572 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:08,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:08,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:08,572 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:08,572 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:08,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:08,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-26 21:34:08,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:08,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:08,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:08,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:08,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:08,653 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:08,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:08,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:08,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:08,665 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:08,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:08,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:08,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:08,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:08,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:08,685 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:09,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:09,351 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:09,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:09,351 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:09,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:09,352 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:09,352 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:09,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:34:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:09,731 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:09,731 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:09,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:09,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:09,731 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:09,731 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:09,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-26 21:34:09,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:09,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:09,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:09,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:09,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:09,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:09,813 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:09,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:09,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:09,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:09,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:09,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:09,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:09,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:09,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:09,849 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:10,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:10,504 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:34:10,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:10,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:10,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:10,505 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:10,505 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:34:10,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:34:10,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:34:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:10,901 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:10,901 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:10,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:10,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:10,902 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:10,902 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:10,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:10,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-26 21:34:10,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:10,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:10,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:10,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:10,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:10,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:10,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:10,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:10,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:11,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:11,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:11,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:11,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:11,013 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:11,646 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:34:11,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:11,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:11,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:11,647 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:11,647 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:11,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:11,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-26 21:34:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:34:11,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:34:11,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-26 21:34:11,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:11,949 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:34:11,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:11,950 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:34:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:11,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:11,950 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:34:11,950 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:11,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-26 21:34:11,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:11,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:11,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:11,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:11,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:12,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:12,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:12,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:12,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:12,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:12,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:12,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:12,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:12,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:12,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:12,084 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-26 21:34:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:12,900 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:34:12,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:12,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:12,900 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:34:12,900 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:34:12,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:34:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:34:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:13,312 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:13,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:13,312 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:13,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:13,312 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:13,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:13,312 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:13,312 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:13,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:13,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-26 21:34:13,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:13,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:13,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,313 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:13,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:13,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:13,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:13,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:13,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:13,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:13,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:13,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:13,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:13,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:13,423 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:14,242 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:34:14,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:14,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:14,243 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:34:14,243 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:34:14,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:14,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:34:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:34:14,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:14,630 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:14,630 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:14,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:14,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:14,630 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:14,630 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:14,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-26 21:34:14,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:14,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:14,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:14,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:14,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:14,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:14,713 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:14,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:14,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:14,736 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:14,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:14,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:14,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:14,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:14,737 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:15,522 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:34:15,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:15,522 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:15,523 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:34:15,523 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:34:15,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:34:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:34:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:15,945 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:15,945 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:15,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:15,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:15,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:15,945 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:15,946 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:15,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:15,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-26 21:34:15,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:15,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:16,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:16,023 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:16,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:16,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:16,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:16,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:16,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:16,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:16,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:16,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:16,056 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:16,836 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:34:16,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:16,836 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:16,837 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:16,837 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:16,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:16,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:17,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-26 21:34:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:34:17,211 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:34:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:17,211 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:34:17,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:34:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:17,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:17,212 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:17,212 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:17,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:17,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-26 21:34:17,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:17,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:17,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:17,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:17,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:17,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:17,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:17,294 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:17,323 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:17,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:17,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:17,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:17,347 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:17,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:17,347 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:34:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:18,149 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:34:18,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:18,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:18,150 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:34:18,150 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:34:18,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:18,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:34:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-26 21:34:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:18,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:18,554 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:18,554 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:18,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:18,554 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:18,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:18,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:18,555 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:18,555 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:18,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-26 21:34:18,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:18,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:18,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:18,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:18,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:18,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:18,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:18,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:18,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:18,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:18,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:18,662 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:19,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:19,517 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-26 21:34:19,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:19,517 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:19,517 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:34:19,517 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:34:19,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:34:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-26 21:34:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:19,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:19,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:19,921 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:19,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:19,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:19,921 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:19,921 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:19,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:19,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-26 21:34:19,921 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:19,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:19,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:19,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:19,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:19,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:19,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:20,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:20,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:20,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:20,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:20,029 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:20,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:20,029 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:20,819 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-26 21:34:20,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:20,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:20,820 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:34:20,820 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:34:20,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:34:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-26 21:34:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:21,233 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:21,233 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:21,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:21,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:21,233 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:21,234 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:21,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-26 21:34:21,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:21,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:21,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:21,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:21,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:21,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:21,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:21,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:21,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:21,333 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:21,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:21,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:21,369 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:21,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:21,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:21,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:21,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:21,370 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:22,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:22,159 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:34:22,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:22,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:22,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:22,160 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:22,160 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:22,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-26 21:34:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:34:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:34:22,510 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:34:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:22,511 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:34:22,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:34:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:22,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:22,511 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:22,511 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:22,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:22,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-26 21:34:22,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:22,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:22,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:22,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:22,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:22,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:22,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:22,599 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:22,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:22,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:22,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:22,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:22,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:22,623 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:34:23,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:23,478 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:34:23,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:23,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:23,479 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:23,479 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:23,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:23,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:23,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:34:23,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:23,890 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:23,890 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:23,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:23,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:23,891 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:23,891 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:23,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:23,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-09-26 21:34:23,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:23,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:23,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:23,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:23,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:23,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:23,975 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:23,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:23,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:23,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:24,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:24,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:24,000 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:24,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:24,735 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:24,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:24,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:24,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:24,736 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:24,736 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:24,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:24,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-26 21:34:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:25,174 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:25,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:25,174 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:25,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:25,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:25,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:25,174 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:25,174 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:25,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-09-26 21:34:25,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:25,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:25,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:25,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:25,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:25,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:25,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:25,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:25,260 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:25,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:25,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:25,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:25,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:25,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:25,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:25,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:25,285 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:26,066 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-26 21:34:26,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:26,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:26,067 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:34:26,067 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:34:26,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:34:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-26 21:34:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:26,481 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:26,482 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:26,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:26,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:26,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:26,482 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:26,482 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:26,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:26,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-09-26 21:34:26,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:26,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:26,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:26,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:26,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:26,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:26,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:26,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:26,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:26,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:26,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:26,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:26,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:26,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:26,592 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:27,307 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:27,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:27,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:27,308 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:27,308 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:27,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:27,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-26 21:34:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:27,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:34:27,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:34:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:27,677 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:34:27,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:34:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:27,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:27,677 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:27,678 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:27,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-09-26 21:34:27,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:27,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:27,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:27,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:27,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:27,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:27,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:27,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:27,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:27,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:27,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:27,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:27,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:27,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:27,783 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:34:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:28,508 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:28,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:28,508 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:28,508 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:28,508 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:28,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:28,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:28,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-26 21:34:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:28,911 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:28,911 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:28,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:28,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:28,912 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:28,912 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:28,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:28,912 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-09-26 21:34:28,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:28,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:28,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:28,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:28,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:29,228 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:29,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:29,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:29,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:29,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:29,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:29,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:29,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:29,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:29,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:29,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:29,271 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:29,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:29,985 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:29,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:29,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:29,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:29,986 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:29,986 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:29,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:34:30,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:30,388 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:30,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:30,388 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:30,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:30,388 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:30,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:30,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:30,388 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:30,388 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:30,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:30,389 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-09-26 21:34:30,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:30,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:30,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:30,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:30,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:30,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:30,452 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:30,459 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:30,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:30,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:30,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:30,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:30,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:30,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:30,493 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:31,194 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:34:31,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:31,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:31,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:31,194 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:31,194 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:34:31,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:34:31,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:34:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:31,643 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:31,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:31,643 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:31,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:31,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:31,643 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:34:31,643 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:31,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:31,644 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-09-26 21:34:31,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:31,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:31,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:31,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:31,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:31,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:31,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:31,813 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:31,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:31,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:31,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:31,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:31,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:31,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:31,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:31,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:31,851 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:32,477 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:34:32,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:32,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:32,477 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:32,477 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:32,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-26 21:34:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:34:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-26 21:34:32,757 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-26 21:34:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:32,757 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-26 21:34:32,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:32,757 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-26 21:34:32,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:32,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:32,757 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:34:32,757 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:32,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:32,758 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-09-26 21:34:32,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:32,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:32,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:32,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:32,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:32,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:32,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:32,838 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:32,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:32,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:32,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:32,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:32,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:32,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:32,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:32,871 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-26 21:34:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:33,634 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:33,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:33,634 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:33,635 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:33,635 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:33,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:33,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:34,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:34:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:34,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:34,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:34,062 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:34,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:34,062 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:34,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:34,062 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:34,063 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:34,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:34,063 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-09-26 21:34:34,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:34,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:34,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:34,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:34,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:34,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:34,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:34,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:34,263 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:34,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:34,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:34,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:34,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:34,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:34,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:34,294 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:35,031 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:35,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:35,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:35,031 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:35,031 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:35,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:34:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:35,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:35,466 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:35,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:35,466 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:35,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:35,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:35,467 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:35,467 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:35,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-09-26 21:34:35,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:35,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:35,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:35,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:35,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:35,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:35,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:35,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:35,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:35,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:35,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:35,604 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:35,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:35,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:35,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:35,605 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:36,364 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:36,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:36,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:36,365 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:36,365 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:36,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:34:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:36,807 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:36,807 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:36,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:36,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:36,808 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:36,808 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:36,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-09-26 21:34:36,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:36,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:36,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:36,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:36,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:36,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:36,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:36,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:36,973 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:36,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:36,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:36,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:36,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:36,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:36,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:36,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:36,998 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:37,715 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:37,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:37,715 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:37,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:37,716 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:37,716 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:37,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:37,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:38,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:34:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:34:38,149 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:34:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:38,149 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:34:38,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:38,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:34:38,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:38,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:38,149 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:38,150 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:38,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:38,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-09-26 21:34:38,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:38,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:38,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:38,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:38,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:38,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:38,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:38,240 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:38,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:38,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:38,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:38,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:38,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:38,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:38,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:38,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:38,302 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:34:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:39,034 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:34:39,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:39,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:39,035 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:39,035 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:34:39,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:34:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:34:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:39,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:39,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:39,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:39,467 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:39,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:39,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:39,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:39,467 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:39,467 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:39,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:39,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-09-26 21:34:39,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:39,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:39,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:39,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:39,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:39,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:39,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:39,671 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:39,680 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:39,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:39,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:39,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:39,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:39,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:39,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:39,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:39,703 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:40,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:40,412 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:34:40,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:40,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:40,413 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:40,413 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:34:40,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:34:40,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:34:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:40,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:40,866 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:40,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:40,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:40,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:40,866 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:40,866 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:40,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:40,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-09-26 21:34:40,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:40,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:40,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:40,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:40,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:40,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:40,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:40,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:40,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:40,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:40,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:40,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:40,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:40,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:40,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:40,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:40,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:40,982 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:41,646 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:34:41,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:41,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:41,647 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:41,647 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:41,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:34:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:42,087 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:42,087 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:42,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:42,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:42,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:42,088 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:42,088 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:42,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:42,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-09-26 21:34:42,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:42,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:42,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:42,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:42,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:42,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:42,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:42,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:42,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:42,237 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:42,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:42,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:42,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:42,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:42,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:42,260 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:42,898 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:34:42,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:42,898 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:42,899 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:34:42,899 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:34:42,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:42,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:34:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-26 21:34:43,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:34:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:34:43,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:34:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:43,266 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:34:43,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:43,266 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:34:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:43,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:43,266 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:43,267 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:43,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-09-26 21:34:43,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:43,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:43,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:43,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:43,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:43,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:43,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:43,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:43,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:43,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:43,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:43,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:43,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:43,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:43,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:43,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:43,378 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:34:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:44,134 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:44,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:44,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:44,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:44,134 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:44,134 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:44,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:44,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:44,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:34:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:44,560 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:44,560 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:44,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:44,560 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:44,560 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:44,560 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:44,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-09-26 21:34:44,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:44,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:44,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:44,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:44,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:44,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:44,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:44,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:44,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:44,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:44,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:44,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:44,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:44,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:44,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:44,696 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:45,436 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:45,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:45,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:45,437 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:45,437 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:45,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-26 21:34:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:45,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:45,859 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:45,859 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:45,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:45,859 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:45,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:45,859 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:45,859 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:45,859 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:45,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:45,859 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-09-26 21:34:45,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:45,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:45,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:45,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:45,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:45,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:45,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:45,954 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:45,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:45,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:45,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:45,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:45,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:45,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:45,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:45,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:45,993 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:46,805 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-26 21:34:46,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:46,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:46,805 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:34:46,805 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:34:46,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:34:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-26 21:34:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:47,239 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:47,239 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:47,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:47,239 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:47,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:47,239 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:47,239 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:47,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:47,240 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-09-26 21:34:47,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:47,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:47,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:47,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:47,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:47,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:47,344 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:47,353 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:47,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:47,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:47,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:47,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:47,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:47,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:47,377 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:48,117 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-26 21:34:48,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:48,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:48,118 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:34:48,118 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:34:48,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:34:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-26 21:34:48,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:48,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:34:48,522 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:34:48,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:48,522 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:34:48,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:48,522 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:34:48,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:48,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:48,522 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:48,522 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:48,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-09-26 21:34:48,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:48,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:48,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:48,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:48,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:48,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:48,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:48,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:48,605 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:48,615 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:48,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:48,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:48,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:48,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:48,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:48,639 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:34:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:49,346 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:34:49,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:49,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:49,346 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:49,346 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:34:49,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:34:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-26 21:34:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:49,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:49,800 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:49,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:49,801 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:49,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:49,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:49,801 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:49,801 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:49,801 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:49,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:49,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-09-26 21:34:49,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:49,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:49,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:49,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:49,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:49,871 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:49,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:49,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:49,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:49,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:49,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:49,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:49,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:49,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:49,907 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:50,625 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-26 21:34:50,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:50,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:50,626 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:34:50,626 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:34:50,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:34:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-26 21:34:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:51,080 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:51,080 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:51,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:51,080 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:51,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:51,080 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:51,080 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:51,080 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:51,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:51,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-09-26 21:34:51,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:51,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:51,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:51,081 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:51,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:51,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:51,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:51,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:51,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:51,164 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:51,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:51,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:51,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:51,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:51,188 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:51,891 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:34:51,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:51,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:51,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:51,892 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:51,892 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:51,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:34:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:52,333 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:52,333 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:52,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:52,333 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:52,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:52,333 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:34:52,333 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:52,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-09-26 21:34:52,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:52,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:52,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:52,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:52,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:52,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:52,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:52,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:52,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:52,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:52,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:52,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:52,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:52,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:52,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:52,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:52,536 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:53,184 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:34:53,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:53,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:53,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:53,185 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:34:53,185 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:34:53,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:53,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:34:53,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-26 21:34:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:34:53,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-26 21:34:53,512 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-26 21:34:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:53,512 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-26 21:34:53,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-26 21:34:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:53,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:53,513 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:53,513 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:53,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:53,513 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-09-26 21:34:53,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:53,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:53,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:53,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:53,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:53,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:53,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:53,590 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:34:53,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:34:53,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:53,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:53,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:53,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:53,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:53,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:53,620 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-26 21:34:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:54,306 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:34:54,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:54,306 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:54,306 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:54,306 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:54,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:54,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:54,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:34:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:54,770 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:54,770 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:54,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:54,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:54,771 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:54,771 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:54,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:54,771 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-09-26 21:34:54,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:54,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:54,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:54,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:54,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:54,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:54,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:54,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:34:54,858 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:34:54,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:54,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:54,889 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:54,889 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:54,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:54,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:54,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:54,890 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:55,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:55,565 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:34:55,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:55,565 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:55,566 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:55,566 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:55,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:34:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:34:56,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:34:56,007 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:34:56,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:56,007 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:34:56,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:56,008 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:34:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:56,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:56,008 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:56,008 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:56,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-09-26 21:34:56,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:56,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:56,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:56,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:56,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:56,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:56,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:56,083 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:34:56,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:34:56,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:56,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:56,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:56,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:56,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:56,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:56,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:56,119 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:34:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:56,771 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:34:56,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:56,771 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:56,772 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:34:56,772 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:34:56,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:34:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-26 21:34:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:57,216 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:57,216 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:57,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:57,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:57,216 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:57,217 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:57,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:57,217 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-09-26 21:34:57,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:57,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:57,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:57,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:57,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:57,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:57,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:57,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:57,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:57,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:57,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:57,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:57,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:57,399 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:34:58,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:58,024 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:34:58,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:58,024 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:58,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:58,025 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:34:58,025 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:34:58,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:34:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-26 21:34:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:34:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-26 21:34:58,475 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-26 21:34:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:58,475 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-26 21:34:58,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-26 21:34:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:58,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:58,475 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:34:58,476 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:58,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:58,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-09-26 21:34:58,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:58,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:58,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:58,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:34:58,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:58,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:58,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:58,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:34:58,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:34:58,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:58,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:58,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:58,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:58,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:58,584 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-26 21:34:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:34:59,270 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:34:59,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:34:59,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:34:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:34:59,271 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:34:59,271 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:34:59,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:34:59,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-26 21:34:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:34:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:34:59,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:34:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:34:59,713 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:34:59,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:34:59,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:34:59,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:34:59,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:34:59,714 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:34:59,714 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:34:59,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:34:59,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-09-26 21:34:59,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:34:59,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:34:59,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:34:59,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:34:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:34:59,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:59,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:34:59,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:34:59,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:34:59,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:34:59,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:34:59,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:34:59,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:34:59,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:34:59,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:34:59,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:34:59,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:34:59,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:34:59,823 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:35:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:00,498 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-26 21:35:00,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:35:00,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:35:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:00,499 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:35:00,499 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:35:00,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:35:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-26 21:35:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:35:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:35:00,948 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:35:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:00,948 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:35:00,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:35:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:35:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:35:00,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:00,949 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:35:00,949 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:00,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:00,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-09-26 21:35:00,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:00,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:00,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:00,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:00,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:01,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:01,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:01,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:35:01,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:35:01,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:01,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:01,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:01,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:35:01,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:35:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:35:01,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:01,056 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-26 21:35:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:01,710 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-26 21:35:01,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:35:01,710 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:35:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:01,711 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:35:01,711 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:35:01,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:01,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:35:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-26 21:35:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:35:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:35:02,189 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:35:02,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:02,189 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:35:02,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:35:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:35:02,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:35:02,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:02,190 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-26 21:35:02,190 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:02,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-09-26 21:35:02,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:02,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:02,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:02,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:02,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:02,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:02,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:02,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:35:02,277 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-26 21:35:02,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:02,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:02,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:02,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:02,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:35:02,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:35:02,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:35:02,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:02,301 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:35:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:02,890 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:35:02,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:35:02,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:35:02,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:02,891 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:35:02,891 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:35:02,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:02,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:35:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-26 21:35:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:35:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-26 21:35:03,269 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-26 21:35:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:03,269 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-26 21:35:03,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:35:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-26 21:35:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:35:03,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:03,270 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-26 21:35:03,270 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:03,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:03,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-09-26 21:35:03,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:03,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:03,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:03,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:03,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:03,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:03,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:03,344 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:35:03,354 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-26 21:35:03,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:03,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:03,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:03,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:35:03,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:35:03,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:35:03,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:03,382 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-26 21:35:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:04,001 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-26 21:35:04,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:35:04,001 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:35:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:04,002 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:35:04,002 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:35:04,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:35:04,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-26 21:35:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:35:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-26 21:35:04,453 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-26 21:35:04,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:04,453 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-26 21:35:04,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:35:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-26 21:35:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:35:04,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:04,453 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:35:04,454 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:04,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:04,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-09-26 21:35:04,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:04,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:04,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:35:04,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:04,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:04,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:04,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:04,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:04,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:04,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:35:04,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:35:04,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:35:04,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:04,558 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-26 21:35:05,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:35:05,152 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-26 21:35:05,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:35:05,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-26 21:35:05,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:35:05,153 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:35:05,153 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:35:05,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:35:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-26 21:35:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:35:05,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-26 21:35:05,595 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-26 21:35:05,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:35:05,595 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-26 21:35:05,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:35:05,595 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-26 21:35:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:35:05,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:35:05,596 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-26 21:35:05,596 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:35:05,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:35:05,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-09-26 21:35:05,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:35:05,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:35:05,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:05,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:35:05,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:35:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:35:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:05,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:35:05,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:35:05,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:35:05,678 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:35:05,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:35:05,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:35:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:35:05,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:35:05,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-26 21:35:05,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:35:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:35:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:35:05,703 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. Received shutdown request... [2018-09-26 21:35:06,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:35:06,045 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:35:06,051 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:35:06,051 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:35:06 BoogieIcfgContainer [2018-09-26 21:35:06,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:35:06,052 INFO L168 Benchmark]: Toolchain (without parser) took 258571.59 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -433.1 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 441.9 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB. [2018-09-26 21:35:06,054 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:35:06,054 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:35:06,055 INFO L168 Benchmark]: Boogie Preprocessor took 24.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:35:06,055 INFO L168 Benchmark]: RCFGBuilder took 288.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:35:06,055 INFO L168 Benchmark]: TraceAbstraction took 258207.45 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -433.1 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 420.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-09-26 21:35:06,057 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.74 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 288.15 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 258207.45 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -433.1 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 420.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while BasicCegarLoop was constructing difference of abstraction (32states) and FLOYD_HOARE automaton (currently 7 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (15 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 258.1s OverallTime, 378 OverallIterations, 8 TraceHistogramMax, 134.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1512 SDtfs, 2898 SDslu, 5174 SDs, 0 SdLazy, 8783 SolverSat, 4876 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9076 GetRequests, 6176 SyntacticMatches, 0 SemanticMatches, 2900 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=256, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 67.5s AutomataMinimizationTime, 377 MinimizatonAttempts, 5623 StatesRemovedByMinimization, 377 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 38.9s InterpolantComputationTime, 12353 NumberOfCodeBlocks, 12353 NumberOfCodeBlocksAsserted, 2134 NumberOfCheckSat, 11598 ConstructedInterpolants, 0 QuantifiedInterpolants, 529176 SizeOfPredicates, 377 NumberOfNonLiveVariables, 16003 ConjunctsInSsa, 3276 ConjunctsInUnsatCore, 755 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35188 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-35-06-066.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-35-06-066.csv Completed graceful shutdown