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 0.1.23-2eb0a67 [2018-10-03 08:53:29,287 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:53:29,289 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:53:29,307 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:53:29,307 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:53:29,308 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:53:29,310 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:53:29,312 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:53:29,315 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:53:29,322 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:53:29,323 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 08:53:29,325 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 08:53:29,326 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 08:53:29,327 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 08:53:29,328 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 08:53:29,329 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 08:53:29,330 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 08:53:29,331 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 08:53:29,333 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 08:53:29,338 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 08:53:29,339 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 08:53:29,340 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 08:53:29,343 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 08:53:29,354 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 [2018-10-03 08:53:29,380 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:53:29,380 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:53:29,381 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:53:29,381 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:53:29,382 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:53:29,383 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:53:29,383 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:53:29,383 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:53:29,383 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:53:29,383 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:53:29,385 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:53:29,385 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:53:29,385 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:53:29,385 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:53:29,385 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:53:29,385 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:53:29,386 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:53:29,386 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:53:29,386 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:53:29,386 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:53:29,387 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:53:29,388 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:53:29,388 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:53:29,388 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:53:29,388 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:53:29,388 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:53:29,389 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:53:29,389 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:53:29,389 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:53:29,389 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:53:29,444 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:53:29,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:53:29,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:53:29,462 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:53:29,463 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:53:29,463 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-10-03 08:53:29,464 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-10-03 08:53:29,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:53:29,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:53:29,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:53:29,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:53:29,513 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:53:29,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,549 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-03 08:53:29,550 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-03 08:53:29,550 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-03 08:53:29,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:53:29,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:53:29,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:53:29,553 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:53:29,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,571 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,572 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/1) ... [2018-10-03 08:53:29,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:53:29,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:53:29,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:53:29,574 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:53:29,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (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 [2018-10-03 08:53:29,636 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-03 08:53:29,636 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-03 08:53:29,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-03 08:53:29,865 INFO L337 CfgBuilder]: Using library mode [2018-10-03 08:53:29,866 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:53:29 BoogieIcfgContainer [2018-10-03 08:53:29,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:53:29,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:53:29,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:53:29,871 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:53:29,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:53:29" (1/2) ... [2018-10-03 08:53:29,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bce42d1 and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:53:29, skipping insertion in model container [2018-10-03 08:53:29,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:53:29" (2/2) ... [2018-10-03 08:53:29,875 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-10-03 08:53:29,885 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:53:29,892 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:53:29,946 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:53:29,946 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:53:29,947 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:53:29,947 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:53:29,947 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:53:29,947 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:53:29,947 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:53:29,948 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:53:29,948 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:53:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-03 08:53:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:53:29,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:29,972 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:53:29,973 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:29,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:29,980 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-10-03 08:53:29,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:29,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:30,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:30,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:30,152 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:53:30,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:53:30,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:53:30,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:53:30,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:53:30,175 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-03 08:53:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:30,256 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-10-03 08:53:30,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:53:30,258 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 08:53:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:30,274 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:53:30,274 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:53:30,283 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 [2018-10-03 08:53:30,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:53:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-10-03 08:53:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:53:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-10-03 08:53:30,339 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-10-03 08:53:30,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:30,339 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-10-03 08:53:30,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:53:30,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-10-03 08:53:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:53:30,340 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:30,341 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 08:53:30,341 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:30,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:30,342 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-10-03 08:53:30,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:30,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:30,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:30,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:30,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:30,418 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 [2018-10-03 08:53:30,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:30,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:30,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:30,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:53:30,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:53:30,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:53:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:53:30,515 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-10-03 08:53:30,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:30,643 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-10-03 08:53:30,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:53:30,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-03 08:53:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:30,645 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:53:30,645 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:53:30,646 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 [2018-10-03 08:53:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:53:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-10-03 08:53:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:53:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-03 08:53:30,649 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-03 08:53:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:30,650 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-03 08:53:30,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:53:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-03 08:53:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:53:30,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:30,651 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 08:53:30,651 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:30,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:30,651 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-10-03 08:53:30,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:30,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:30,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:30,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:30,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:30,797 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 [2018-10-03 08:53:30,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:30,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:30,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:30,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:53:30,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:53:30,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:53:30,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:53:30,862 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-10-03 08:53:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:30,905 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-10-03 08:53:30,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:53:30,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-10-03 08:53:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:30,907 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:53:30,908 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:53:30,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:53:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:53:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-10-03 08:53:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:53:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-10-03 08:53:30,914 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-10-03 08:53:30,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:30,915 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-10-03 08:53:30,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:53:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-10-03 08:53:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:53:30,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:30,916 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-03 08:53:30,916 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:30,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:30,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-10-03 08:53:30,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:30,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:30,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:30,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:31,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:31,042 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:31,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:31,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:31,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:31,084 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:53:31,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:53:31,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:53:31,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:53:31,085 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-10-03 08:53:31,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:31,172 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-03 08:53:31,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:53:31,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-03 08:53:31,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:31,174 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:53:31,174 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:53:31,174 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 [2018-10-03 08:53:31,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:53:31,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-03 08:53:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:53:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-03 08:53:31,179 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-03 08:53:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:31,179 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-03 08:53:31,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:53:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-03 08:53:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:53:31,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:31,181 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-03 08:53:31,182 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:31,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:31,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-10-03 08:53:31,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:31,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:31,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:31,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:31,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:31,269 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 [2018-10-03 08:53:31,277 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:31,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:31,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:53:31,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:53:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:53:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:53:31,320 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-03 08:53:31,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:31,486 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-10-03 08:53:31,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:53:31,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-03 08:53:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:31,490 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:53:31,490 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:53:31,491 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 [2018-10-03 08:53:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:53:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-10-03 08:53:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:53:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-03 08:53:31,499 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-03 08:53:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:31,499 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-03 08:53:31,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:53:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-03 08:53:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:53:31,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:31,501 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-03 08:53:31,502 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:31,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-10-03 08:53:31,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:31,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:31,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:31,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:31,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:31,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:31,685 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:31,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:31,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:31,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:53:31,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:53:31,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:53:31,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:53:31,717 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-10-03 08:53:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:31,767 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-10-03 08:53:31,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:53:31,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-03 08:53:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:31,772 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:53:31,772 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:53:31,773 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 [2018-10-03 08:53:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:53:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-10-03 08:53:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:53:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-03 08:53:31,778 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-10-03 08:53:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:31,778 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-03 08:53:31,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:53:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-03 08:53:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:53:31,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:31,779 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-10-03 08:53:31,780 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:31,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:31,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-10-03 08:53:31,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:31,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:31,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:31,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:31,860 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 [2018-10-03 08:53:31,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:31,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:31,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:31,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:31,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:31,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:53:31,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:53:31,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:53:31,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:53:31,916 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-10-03 08:53:31,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:31,961 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-10-03 08:53:31,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:53:31,963 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-10-03 08:53:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:31,964 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:53:31,964 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:53:31,964 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 [2018-10-03 08:53:31,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:53:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-10-03 08:53:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:53:31,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-10-03 08:53:31,969 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-10-03 08:53:31,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:31,970 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-10-03 08:53:31,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:53:31,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-10-03 08:53:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:31,971 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:31,971 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-03 08:53:31,971 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:31,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:31,972 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-10-03 08:53:31,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:31,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:31,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:31,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:32,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:32,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:32,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:53:32,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:32,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:32,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:32,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:32,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:32,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:32,214 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-10-03 08:53:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:32,251 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-03 08:53:32,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:32,251 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:32,252 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:53:32,252 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:53:32,253 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 [2018-10-03 08:53:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:53:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-03 08:53:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:53:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-03 08:53:32,259 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-03 08:53:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:32,259 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-03 08:53:32,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-03 08:53:32,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:32,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:32,260 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-03 08:53:32,261 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:32,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:32,261 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-10-03 08:53:32,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:32,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:32,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:32,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:32,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:32,358 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 [2018-10-03 08:53:32,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:32,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:53:32,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:32,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:32,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:32,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:32,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:32,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:32,408 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-03 08:53:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:32,472 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-03 08:53:32,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:32,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:32,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:32,473 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:53:32,473 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:53:32,474 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 [2018-10-03 08:53:32,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:53:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-03 08:53:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:53:32,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-03 08:53:32,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-03 08:53:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:32,479 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-03 08:53:32,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-03 08:53:32,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:32,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:32,480 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-03 08:53:32,481 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:32,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:32,481 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-10-03 08:53:32,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:32,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:32,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:32,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:32,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:32,537 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 [2018-10-03 08:53:32,545 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:32,550 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:32,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:32,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:32,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:32,578 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:32,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:32,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:32,579 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-03 08:53:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:32,617 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-10-03 08:53:32,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:32,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:32,618 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:53:32,619 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:53:32,619 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 [2018-10-03 08:53:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:53:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-10-03 08:53:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:53:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-03 08:53:32,624 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-03 08:53:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:32,624 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-03 08:53:32,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-03 08:53:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:32,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:32,625 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-03 08:53:32,626 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:32,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:32,626 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-10-03 08:53:32,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:32,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:32,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:32,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:32,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:32,718 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 [2018-10-03 08:53:32,736 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:32,797 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:53:32,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:32,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:32,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:32,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:32,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:32,840 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-03 08:53:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:33,027 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-10-03 08:53:33,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:33,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:33,029 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:53:33,029 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:53:33,030 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 [2018-10-03 08:53:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:53:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-10-03 08:53:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:53:33,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-03 08:53:33,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-03 08:53:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:33,034 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-03 08:53:33,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:33,035 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-03 08:53:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:33,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:33,035 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-03 08:53:33,036 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:33,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-10-03 08:53:33,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:33,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:33,086 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 [2018-10-03 08:53:33,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:33,099 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:53:33,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:33,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:33,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:33,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:33,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:33,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:33,127 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-10-03 08:53:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:33,164 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-03 08:53:33,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:33,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:33,165 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:53:33,165 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:53:33,165 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 [2018-10-03 08:53:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:53:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-10-03 08:53:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:33,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-03 08:53:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:33,173 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:33,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:33,174 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:33,174 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-03 08:53:33,174 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:33,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:33,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-10-03 08:53:33,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:33,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:33,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:33,319 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 [2018-10-03 08:53:33,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:33,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:33,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:33,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:33,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:33,362 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-03 08:53:33,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:33,390 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-03 08:53:33,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:33,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:33,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:33,392 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:53:33,392 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:53:33,393 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 [2018-10-03 08:53:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:53:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-10-03 08:53:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:53:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-03 08:53:33,400 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-10-03 08:53:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:33,401 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-03 08:53:33,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:33,401 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-03 08:53:33,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:33,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:33,402 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-10-03 08:53:33,402 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:33,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:33,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-10-03 08:53:33,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:33,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:33,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:33,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:33,471 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 [2018-10-03 08:53:33,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:33,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:33,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:33,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:33,515 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:33,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:33,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:33,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:33,516 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-10-03 08:53:33,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:33,562 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-10-03 08:53:33,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:33,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:33,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:33,566 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:53:33,566 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:53:33,567 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 [2018-10-03 08:53:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:53:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-10-03 08:53:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:33,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:33,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-10-03 08:53:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:33,573 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:33,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:33,574 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:33,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:53:33,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:33,574 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-10-03 08:53:33,575 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:33,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:33,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-10-03 08:53:33,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:33,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:33,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:33,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:33,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:33,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:33,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:53:33,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:33,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:33,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:33,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:53:33,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:53:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:53:33,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:53:33,856 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-10-03 08:53:33,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:33,913 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-10-03 08:53:33,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:53:33,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-10-03 08:53:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:33,915 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:53:33,915 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:53:33,916 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 [2018-10-03 08:53:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:53:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-10-03 08:53:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:53:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-10-03 08:53:33,920 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-10-03 08:53:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:33,921 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-10-03 08:53:33,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:53:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-10-03 08:53:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:33,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:33,922 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-03 08:53:33,922 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:33,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-10-03 08:53:33,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:33,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:33,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:33,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,048 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:34,048 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 [2018-10-03 08:53:34,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:34,080 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:34,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:34,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:34,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:34,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:34,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:34,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:34,118 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-10-03 08:53:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:34,173 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-03 08:53:34,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:34,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:34,174 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:53:34,174 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:53:34,175 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 [2018-10-03 08:53:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:53:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-03 08:53:34,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:34,182 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-03 08:53:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:34,182 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:34,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:34,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:34,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:34,183 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:34,183 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:34,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:34,184 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-10-03 08:53:34,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:34,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:34,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:34,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:34,286 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 [2018-10-03 08:53:34,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:34,305 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-03 08:53:34,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:34,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:34,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:34,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:34,334 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-03 08:53:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:34,375 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-03 08:53:34,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:34,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:34,376 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:53:34,376 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:53:34,376 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 [2018-10-03 08:53:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:53:34,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-03 08:53:34,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:34,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:34,384 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-03 08:53:34,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:34,384 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:34,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:34,384 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:34,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:34,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:34,385 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:34,385 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:34,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:34,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-10-03 08:53:34,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:34,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:34,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:34,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:34,491 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 [2018-10-03 08:53:34,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:34,519 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:34,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:34,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:34,551 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:34,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:34,551 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-03 08:53:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:34,611 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-03 08:53:34,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:34,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:34,613 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:53:34,613 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:53:34,613 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 [2018-10-03 08:53:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:53:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-03 08:53:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:34,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-03 08:53:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:34,621 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:34,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:34,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:34,622 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-03 08:53:34,623 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:34,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-10-03 08:53:34,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:34,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:34,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:34,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:34,740 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 [2018-10-03 08:53:34,754 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:34,776 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-03 08:53:34,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:34,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:34,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:34,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:34,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:34,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:34,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:34,810 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-03 08:53:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:34,917 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-03 08:53:34,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:34,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:34,919 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:53:34,919 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:53:34,919 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 [2018-10-03 08:53:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:53:34,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-03 08:53:34,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:53:34,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-03 08:53:34,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-03 08:53:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:34,929 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-03 08:53:34,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-03 08:53:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:34,930 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:34,930 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:34,931 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:34,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-10-03 08:53:34,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:34,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:34,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:34,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:35,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:35,192 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 [2018-10-03 08:53:35,199 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:35,207 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 08:53:35,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:35,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:35,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:35,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:35,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:35,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:35,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:35,240 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-03 08:53:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:35,405 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-03 08:53:35,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:35,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:35,406 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:53:35,406 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:53:35,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:35,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:53:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-10-03 08:53:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:35,417 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-03 08:53:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:35,417 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:35,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:35,417 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:35,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:35,418 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-03 08:53:35,418 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:35,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-10-03 08:53:35,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:35,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:35,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:35,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:35,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:35,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:35,698 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:35,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:35,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:35,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:35,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:35,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:35,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:35,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:35,738 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-03 08:53:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:35,901 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-03 08:53:35,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:35,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:35,903 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:53:35,903 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:53:35,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:53:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-10-03 08:53:35,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:35,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-03 08:53:35,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:35,913 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:35,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:35,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:35,914 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-03 08:53:35,915 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:35,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-10-03 08:53:35,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:35,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:35,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:35,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:35,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:35,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:35,995 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 [2018-10-03 08:53:36,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:36,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:36,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:36,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:36,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:36,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:36,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:36,059 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-03 08:53:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:36,103 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-10-03 08:53:36,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:36,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:36,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:36,106 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:53:36,106 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:53:36,107 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 [2018-10-03 08:53:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:53:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-03 08:53:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:36,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-03 08:53:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:36,114 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:36,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:36,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:36,114 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:36,115 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:36,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:36,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-10-03 08:53:36,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:36,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:36,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:36,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:36,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:36,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:36,176 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:36,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-03 08:53:36,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:36,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:36,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:36,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:36,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:36,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:36,218 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-03 08:53:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:36,499 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-10-03 08:53:36,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:36,499 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:36,500 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:53:36,500 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:53:36,501 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 [2018-10-03 08:53:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:53:36,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-10-03 08:53:36,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:53:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-03 08:53:36,508 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-03 08:53:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:36,508 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-03 08:53:36,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-03 08:53:36,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:36,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:36,509 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:36,509 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:36,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:36,510 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-10-03 08:53:36,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:36,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:36,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:36,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:36,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:36,766 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:36,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:36,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:36,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:36,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:36,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:36,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:36,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:36,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:36,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:36,814 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-10-03 08:53:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:36,886 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:36,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:36,886 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:36,886 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:36,887 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:36,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:36,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:36,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-03 08:53:36,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:36,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:36,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-03 08:53:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:36,897 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:36,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:36,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:36,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:36,898 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-03 08:53:36,898 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:36,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-10-03 08:53:36,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:36,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:36,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:36,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:37,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:37,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:37,080 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-03 08:53:37,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:37,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,106 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:37,107 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:37,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:37,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:37,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:37,108 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-03 08:53:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:37,241 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-03 08:53:37,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:37,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:37,241 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:37,242 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:37,242 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 [2018-10-03 08:53:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-10-03 08:53:37,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:37,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:37,251 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-03 08:53:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:37,251 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:37,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:37,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:37,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:37,252 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-03 08:53:37,252 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:37,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:37,253 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-10-03 08:53:37,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:37,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:37,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:37,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:37,359 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 [2018-10-03 08:53:37,368 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:37,380 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 08:53:37,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:37,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:37,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:37,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:37,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:37,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:37,421 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-03 08:53:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:37,523 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:37,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:37,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:37,524 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:37,524 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:37,524 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 [2018-10-03 08:53:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-03 08:53:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:37,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:37,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-03 08:53:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:37,533 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:37,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:37,533 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:37,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:37,534 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:37,534 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:37,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-10-03 08:53:37,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:37,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:37,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,535 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:37,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:37,573 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 [2018-10-03 08:53:37,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:37,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:37,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:37,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:37,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:37,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:37,612 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-03 08:53:37,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:37,690 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-03 08:53:37,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:37,690 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:37,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:37,691 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:37,691 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:37,691 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 [2018-10-03 08:53:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:37,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-10-03 08:53:37,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:37,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-10-03 08:53:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:37,699 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:37,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:37,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:37,700 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-10-03 08:53:37,701 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:37,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-10-03 08:53:37,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:37,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:37,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:37,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:37,797 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 [2018-10-03 08:53:37,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:37,809 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:37,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:37,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:37,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:37,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:37,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:37,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:37,835 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-10-03 08:53:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:37,874 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-03 08:53:37,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:37,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:37,875 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:53:37,875 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:53:37,876 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 [2018-10-03 08:53:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:53:37,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-10-03 08:53:37,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:37,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:37,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-03 08:53:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:37,885 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:37,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:37,886 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:37,886 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:37,886 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:37,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-10-03 08:53:37,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:37,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:37,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:37,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:37,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:37,987 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 [2018-10-03 08:53:37,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:38,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-03 08:53:38,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:38,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:38,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:38,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:38,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:38,034 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-03 08:53:38,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:38,075 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-03 08:53:38,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:38,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:38,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:38,077 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:53:38,077 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:53:38,078 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 [2018-10-03 08:53:38,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:53:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-10-03 08:53:38,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:38,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-10-03 08:53:38,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:38,087 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:38,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:38,087 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:38,088 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:38,088 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-10-03 08:53:38,088 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:38,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:38,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-10-03 08:53:38,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:38,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:38,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:38,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:38,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:38,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:38,153 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:38,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:38,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:38,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:38,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:38,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:38,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:38,184 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-10-03 08:53:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:38,233 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-10-03 08:53:38,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:38,235 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:38,235 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:53:38,235 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:53:38,236 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 [2018-10-03 08:53:38,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:53:38,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-10-03 08:53:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:38,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:38,244 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-10-03 08:53:38,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:38,244 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:38,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:38,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:53:38,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:38,245 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-10-03 08:53:38,245 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:38,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:38,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-10-03 08:53:38,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:38,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:38,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:38,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:38,312 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 [2018-10-03 08:53:38,321 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:38,346 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:38,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:38,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:38,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:53:38,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:53:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:53:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:53:38,380 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-10-03 08:53:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:38,426 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-10-03 08:53:38,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:53:38,427 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-10-03 08:53:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:38,427 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:53:38,427 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:53:38,428 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 [2018-10-03 08:53:38,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:53:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-10-03 08:53:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:53:38,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-10-03 08:53:38,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-10-03 08:53:38,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:38,435 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-10-03 08:53:38,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:53:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-10-03 08:53:38,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:38,436 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:38,436 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-03 08:53:38,437 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:38,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:38,437 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-10-03 08:53:38,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:38,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:38,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:38,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:38,515 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 [2018-10-03 08:53:38,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:38,601 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:38,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:38,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:38,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:38,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:38,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:38,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:38,643 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-10-03 08:53:38,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:38,805 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:38,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:38,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:38,806 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:38,806 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:38,807 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 [2018-10-03 08:53:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:38,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-03 08:53:38,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:38,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:38,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:38,818 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:38,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:38,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:38,819 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:38,819 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:38,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-10-03 08:53:38,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:38,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:38,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:38,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:38,877 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 [2018-10-03 08:53:38,886 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:38,894 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:38,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:38,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:38,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:38,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:38,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:38,921 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:38,971 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:38,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:38,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:38,972 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:38,972 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:38,972 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 [2018-10-03 08:53:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-03 08:53:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:38,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-03 08:53:38,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:38,985 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:38,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:38,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:38,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:38,986 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:38,986 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:38,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-10-03 08:53:38,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:38,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:38,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:38,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:38,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:39,060 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 [2018-10-03 08:53:39,069 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:39,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-03 08:53:39,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:39,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:39,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:39,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:39,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:39,106 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-03 08:53:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:39,150 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:39,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:39,150 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:39,151 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:39,151 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:39,152 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 [2018-10-03 08:53:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-03 08:53:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:39,166 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:39,166 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:39,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:39,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:39,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:39,167 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:39,167 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:39,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:39,167 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-10-03 08:53:39,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:39,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:39,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:39,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:39,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:39,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:39,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,354 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:39,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:39,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:39,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:39,355 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:39,454 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:39,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:39,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:39,454 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:39,454 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:39,455 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 [2018-10-03 08:53:39,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-03 08:53:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:39,465 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-03 08:53:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:39,465 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:39,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:39,465 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:39,465 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:39,466 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:39,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-10-03 08:53:39,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:39,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:39,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:39,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:39,602 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 [2018-10-03 08:53:39,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:39,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:39,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:39,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:39,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:39,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:39,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:39,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:39,640 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-03 08:53:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:39,693 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-03 08:53:39,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:39,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:39,695 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:39,695 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:39,695 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 [2018-10-03 08:53:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-03 08:53:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:39,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:39,710 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:39,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:39,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:39,710 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:39,710 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:39,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-10-03 08:53:39,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:39,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:39,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:39,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:39,769 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 [2018-10-03 08:53:39,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:39,784 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:53:39,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:39,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:39,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:39,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:39,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:39,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:39,809 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:39,848 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-03 08:53:39,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:39,849 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:39,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:39,849 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:39,849 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:39,850 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 [2018-10-03 08:53:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:39,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-03 08:53:39,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:39,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:39,864 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-03 08:53:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:39,865 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:39,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:39,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:39,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:39,865 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:39,866 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:39,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-10-03 08:53:39,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:39,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:39,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:39,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:39,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:39,954 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:39,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:39,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:39,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:39,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:39,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:39,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:39,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:39,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:39,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:39,986 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-03 08:53:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:40,039 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-03 08:53:40,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:40,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:40,040 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:53:40,040 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:53:40,040 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 [2018-10-03 08:53:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:53:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-03 08:53:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:40,053 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:40,053 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:40,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:40,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:40,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:40,054 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:40,054 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:40,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:40,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-10-03 08:53:40,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:40,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:40,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:40,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:40,217 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 [2018-10-03 08:53:40,230 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:40,238 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:40,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:40,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:40,246 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,268 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:40,268 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:40,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:40,269 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:40,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:40,349 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-03 08:53:40,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:40,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:40,350 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:53:40,350 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:53:40,351 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 [2018-10-03 08:53:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:53:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-03 08:53:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:40,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-03 08:53:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:40,361 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:40,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:40,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:40,362 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:40,362 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:40,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:40,363 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-10-03 08:53:40,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:40,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:40,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:40,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:40,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:40,500 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:40,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-03 08:53:40,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:40,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:40,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:40,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:40,535 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-03 08:53:40,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:40,585 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:40,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:40,585 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:40,586 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:40,586 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:40,586 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 [2018-10-03 08:53:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-03 08:53:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:40,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:40,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:40,602 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:40,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:40,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:40,602 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:40,602 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:40,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-10-03 08:53:40,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:40,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:40,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:40,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:40,651 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 [2018-10-03 08:53:40,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:40,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:40,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:40,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:40,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:40,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:40,694 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:40,753 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:40,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:40,753 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:40,753 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:40,754 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:40,754 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 [2018-10-03 08:53:40,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:40,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-10-03 08:53:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:40,768 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-03 08:53:40,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:40,768 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:40,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:40,768 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:40,769 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:40,769 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:40,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-10-03 08:53:40,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:40,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:40,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:40,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:40,944 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 [2018-10-03 08:53:40,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:40,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:40,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:40,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:40,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:40,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:40,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:40,996 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-03 08:53:41,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:41,048 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:41,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:41,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:41,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:41,049 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:41,049 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:41,049 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 [2018-10-03 08:53:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-03 08:53:41,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:41,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:41,064 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:41,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:41,064 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:41,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:41,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:41,064 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:41,065 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:41,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:41,065 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-10-03 08:53:41,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:41,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:41,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:41,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:41,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:53:41,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:41,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:53:41,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:41,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:41,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:41,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:41,195 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:41,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:41,240 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:41,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:41,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:41,241 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:41,241 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:41,241 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 [2018-10-03 08:53:41,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:41,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-10-03 08:53:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:41,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:41,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-03 08:53:41,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:41,253 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:41,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:41,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:41,253 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:41,253 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:41,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-10-03 08:53:41,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:41,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:41,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:41,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:41,304 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 [2018-10-03 08:53:41,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:41,325 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:41,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:41,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:41,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:41,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:41,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:41,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:41,350 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-03 08:53:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:41,543 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-03 08:53:41,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:41,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:41,543 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:41,543 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:41,544 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 [2018-10-03 08:53:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-10-03 08:53:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:41,558 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:41,558 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:41,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:41,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:41,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:41,558 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:41,559 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:41,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:41,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-10-03 08:53:41,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:41,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:41,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:41,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:41,615 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 [2018-10-03 08:53:41,622 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:41,629 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:41,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:41,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:41,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:41,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:41,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:41,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:41,654 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:41,695 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-03 08:53:41,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:41,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:41,695 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:41,695 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:41,696 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 [2018-10-03 08:53:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-10-03 08:53:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:41,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:41,709 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-03 08:53:41,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:41,709 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:41,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:41,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:41,709 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:41,709 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:41,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:41,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-10-03 08:53:41,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:41,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:41,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:41,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:41,762 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:41,762 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 [2018-10-03 08:53:41,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:41,782 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-03 08:53:41,782 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:41,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:41,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:41,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:41,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:41,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:41,812 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-03 08:53:41,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:41,883 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-10-03 08:53:41,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:41,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:41,885 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:53:41,885 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:53:41,885 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 [2018-10-03 08:53:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:53:41,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-10-03 08:53:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:41,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:41,902 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:41,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:41,902 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:41,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:41,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:41,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:41,903 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:41,903 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:41,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:41,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-10-03 08:53:41,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:41,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:41,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:41,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:41,953 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:41,953 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 [2018-10-03 08:53:41,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:41,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:41,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:41,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:41,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:41,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:41,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:41,990 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:42,048 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-10-03 08:53:42,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:42,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:42,050 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:53:42,050 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:53:42,050 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 [2018-10-03 08:53:42,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:53:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-10-03 08:53:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:42,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-03 08:53:42,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:42,062 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:42,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:42,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:42,063 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:42,063 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:42,063 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:42,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:42,063 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-10-03 08:53:42,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:42,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:42,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:42,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:42,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:42,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:42,657 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 [2018-10-03 08:53:42,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:42,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:42,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:42,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:42,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:42,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:42,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:42,708 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-10-03 08:53:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:42,814 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:42,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:42,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:42,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:42,815 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:42,815 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:42,815 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 [2018-10-03 08:53:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:42,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-03 08:53:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:42,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:42,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:42,835 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:42,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:42,835 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:42,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:42,836 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:42,836 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:42,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:42,836 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-10-03 08:53:42,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:42,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:42,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:42,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:42,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:42,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:42,882 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 [2018-10-03 08:53:42,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:42,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:53:42,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:42,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:42,932 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:42,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:42,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:42,933 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:43,118 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:43,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:43,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:43,119 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:43,119 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:43,119 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 [2018-10-03 08:53:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-03 08:53:43,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:43,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:43,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:43,139 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:43,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:43,139 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:43,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:43,140 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:43,140 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:43,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:43,140 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-10-03 08:53:43,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:43,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:43,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:43,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:43,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:43,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:43,203 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:43,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:43,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:43,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:43,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:43,228 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:43,283 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:43,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:43,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:43,284 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:43,285 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:43,285 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 [2018-10-03 08:53:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-03 08:53:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:43,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:43,308 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:43,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:43,309 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:43,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:43,309 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:43,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:43,309 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:43,310 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:43,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:43,310 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-10-03 08:53:43,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:43,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:43,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:43,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:43,482 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 [2018-10-03 08:53:43,492 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:43,499 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:43,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:43,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:43,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:43,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:43,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:43,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:43,523 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:43,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:43,573 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:43,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:43,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:43,573 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:43,574 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:43,574 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 [2018-10-03 08:53:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:43,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-10-03 08:53:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:43,590 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-03 08:53:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:43,590 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:43,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:43,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:43,591 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:43,591 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:43,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:43,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-10-03 08:53:43,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:43,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:43,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:43,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,638 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:43,638 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 [2018-10-03 08:53:43,646 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:43,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-03 08:53:43,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:43,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:43,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:43,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:43,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:43,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:43,675 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-03 08:53:43,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:43,746 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:43,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:43,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:43,747 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:43,747 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:43,747 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 [2018-10-03 08:53:43,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-03 08:53:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:43,766 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:43,766 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:43,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:43,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:43,766 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:43,766 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:43,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-10-03 08:53:43,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:43,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:43,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:43,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:43,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:43,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:43,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:43,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:43,864 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:43,864 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:43,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:43,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:43,865 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:43,933 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:43,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:43,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:43,934 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:43,934 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:43,934 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 [2018-10-03 08:53:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-03 08:53:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:43,953 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:43,953 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:43,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:43,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:43,954 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:43,954 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:43,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:43,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-10-03 08:53:43,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:43,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:43,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,955 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:43,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:44,006 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 [2018-10-03 08:53:44,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:44,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:44,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:44,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:44,046 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:44,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:44,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:44,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:44,046 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:44,245 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:44,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:44,245 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:44,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:44,246 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:44,246 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:44,246 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 [2018-10-03 08:53:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-03 08:53:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:44,268 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:44,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:44,269 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:44,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:44,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:44,269 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:44,269 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:44,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:44,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-10-03 08:53:44,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:44,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,271 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:44,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:44,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:44,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:44,337 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:53:44,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:44,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:44,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:44,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:44,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:44,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:44,361 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:44,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:44,430 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:44,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:44,430 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:44,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:44,431 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:44,431 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:44,431 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 [2018-10-03 08:53:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-10-03 08:53:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:44,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:44,448 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-10-03 08:53:44,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:44,449 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:44,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:44,449 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:44,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:44,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:44,449 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:44,449 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:44,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-10-03 08:53:44,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:44,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:44,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:44,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:44,579 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:44,579 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 [2018-10-03 08:53:44,587 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:44,591 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:44,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:44,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:44,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:44,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:44,615 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-10-03 08:53:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:44,683 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:44,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:44,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:44,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:44,684 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:44,684 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:44,684 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 [2018-10-03 08:53:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-03 08:53:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:44,710 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:44,710 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:44,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:44,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:44,710 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:44,711 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:44,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-10-03 08:53:44,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:44,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:44,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:44,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:44,792 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 [2018-10-03 08:53:44,800 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:44,806 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:44,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:44,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:44,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:44,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:44,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:44,836 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:44,898 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:44,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:44,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:44,898 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:44,898 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:44,899 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 [2018-10-03 08:53:44,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-10-03 08:53:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:44,927 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:44,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:44,927 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:44,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:44,927 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:44,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:44,928 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:44,928 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:44,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-10-03 08:53:44,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:44,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:44,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:44,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:45,013 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 [2018-10-03 08:53:45,020 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:45,025 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-03 08:53:45,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:45,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:45,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:45,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:45,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:45,056 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:45,130 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:45,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:45,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:45,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:45,131 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:45,131 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:45,132 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 [2018-10-03 08:53:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:45,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-03 08:53:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:45,155 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:45,155 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:45,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:45,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:45,155 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:45,156 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:45,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:45,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-10-03 08:53:45,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:45,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:45,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:45,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:45,250 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 [2018-10-03 08:53:45,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:45,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:45,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:45,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:45,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:45,303 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:45,411 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:45,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:45,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:45,412 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:45,412 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:45,413 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 [2018-10-03 08:53:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-10-03 08:53:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:45,433 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-10-03 08:53:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:45,433 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:45,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:45,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:45,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:45,434 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-10-03 08:53:45,434 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:45,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:45,435 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-10-03 08:53:45,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:45,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:45,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:45,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:45,485 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 [2018-10-03 08:53:45,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:45,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:45,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:45,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:45,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:45,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:45,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:45,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:45,527 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-10-03 08:53:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:45,597 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:45,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:45,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:45,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:45,598 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:45,598 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:45,599 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 [2018-10-03 08:53:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:45,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-10-03 08:53:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:45,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:45,626 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:45,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:45,627 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:45,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:45,627 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:45,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:45,627 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:45,627 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:45,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:45,628 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-10-03 08:53:45,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:45,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:45,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:45,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:45,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:45,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:45,691 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:53:45,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:45,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:45,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:45,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:45,716 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:45,791 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:45,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:45,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:45,792 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:45,792 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:45,792 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 [2018-10-03 08:53:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-03 08:53:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:45,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-10-03 08:53:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:45,817 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:45,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:45,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:45,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:45,817 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-10-03 08:53:45,817 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:45,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:45,818 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-10-03 08:53:45,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:45,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:45,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:45,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:45,909 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 [2018-10-03 08:53:45,918 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:45,924 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:45,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:45,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:45,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:45,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:45,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:45,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:45,948 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-10-03 08:53:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:45,995 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-10-03 08:53:45,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:45,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:45,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:45,996 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:53:45,996 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:53:45,996 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 [2018-10-03 08:53:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:53:46,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-03 08:53:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:46,019 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-10-03 08:53:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:46,019 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:46,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:53:46,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:46,020 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-10-03 08:53:46,020 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:46,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:46,020 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-10-03 08:53:46,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:46,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:46,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:46,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:46,116 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,117 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:46,117 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 [2018-10-03 08:53:46,125 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:46,132 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:53:46,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:46,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:46,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:53:46,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:53:46,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:53:46,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:53:46,158 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-10-03 08:53:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:46,206 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-10-03 08:53:46,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:53:46,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-03 08:53:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:46,207 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:53:46,207 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:53:46,207 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 [2018-10-03 08:53:46,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:53:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-10-03 08:53:46,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:53:46,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-10-03 08:53:46,225 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-10-03 08:53:46,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:46,225 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-10-03 08:53:46,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:53:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-10-03 08:53:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:46,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:46,226 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-03 08:53:46,226 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:46,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:46,226 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-10-03 08:53:46,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:46,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:46,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:46,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:46,286 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 [2018-10-03 08:53:46,296 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:46,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:46,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:46,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:46,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:46,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:46,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:46,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:46,334 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-10-03 08:53:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:46,426 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:46,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:46,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:46,427 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:46,427 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:46,428 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 [2018-10-03 08:53:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-03 08:53:46,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:46,460 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:46,460 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:46,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:46,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:46,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:46,461 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:53:46,461 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:46,462 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-10-03 08:53:46,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:46,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:46,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:46,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:46,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:46,549 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:46,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:53:46,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:46,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:46,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:46,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:46,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:46,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:46,594 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:46,698 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:46,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:46,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:46,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:46,699 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:46,699 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:46,699 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 [2018-10-03 08:53:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:46,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-03 08:53:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:46,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:46,731 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:46,731 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:46,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:46,732 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:46,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:46,732 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:53:46,732 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:46,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:46,732 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-10-03 08:53:46,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:46,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:46,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:46,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:46,790 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 [2018-10-03 08:53:46,799 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:46,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:46,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:46,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:46,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:46,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:46,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:46,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:46,833 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:47,041 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:47,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:47,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:47,041 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:47,042 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:47,042 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 [2018-10-03 08:53:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:47,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-03 08:53:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:47,073 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:47,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:47,073 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:47,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:47,073 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:47,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:47,073 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:47,073 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:47,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-10-03 08:53:47,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:47,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:47,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:47,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:47,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:47,272 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 [2018-10-03 08:53:47,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:47,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:47,308 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:47,309 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:47,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:47,309 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:47,386 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:47,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:47,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:47,387 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:47,387 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:47,387 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 [2018-10-03 08:53:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:47,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-03 08:53:47,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:47,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:47,417 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-03 08:53:47,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:47,417 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:47,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:47,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:47,418 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:47,418 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:53:47,418 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:47,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:47,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-10-03 08:53:47,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:47,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:47,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:47,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:47,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:47,487 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 [2018-10-03 08:53:47,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:47,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:47,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:47,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:47,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:47,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:47,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:47,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:47,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:47,526 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-03 08:53:47,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:47,629 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:47,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:47,629 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:47,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:47,630 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:47,630 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:47,631 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 [2018-10-03 08:53:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-03 08:53:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:47,666 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:47,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:47,667 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:47,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:47,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:47,667 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:47,667 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:47,667 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:47,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:47,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-10-03 08:53:47,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:47,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:47,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:47,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:47,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:47,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:47,745 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:47,755 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:53:47,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:47,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:47,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:47,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:47,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:47,779 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:47,872 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:47,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:47,872 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:47,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:47,873 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:47,873 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:47,874 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 [2018-10-03 08:53:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:47,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-03 08:53:47,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:47,907 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:47,907 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:47,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:47,907 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:47,907 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:47,908 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:47,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:47,908 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-10-03 08:53:47,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:47,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:47,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:47,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:48,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:48,039 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 [2018-10-03 08:53:48,046 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:48,076 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:48,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:48,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:48,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:48,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:48,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:48,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:48,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:48,114 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:48,204 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:48,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:48,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:48,205 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:48,205 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:48,205 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 [2018-10-03 08:53:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-03 08:53:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:48,240 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:48,240 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:48,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:48,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:48,241 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:48,241 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:48,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:48,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-10-03 08:53:48,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:48,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:48,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:48,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:48,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:48,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:48,886 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 [2018-10-03 08:53:48,896 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:48,908 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:53:48,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:48,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:48,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:48,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:48,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:48,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:48,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:48,934 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:49,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:49,029 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:49,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:49,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:49,029 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:49,030 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:49,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-03 08:53:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:49,058 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-03 08:53:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:49,058 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:49,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:49,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:49,059 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:53:49,059 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:49,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:49,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-10-03 08:53:49,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:49,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:49,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:49,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:49,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:49,128 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:49,138 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:49,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:49,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:49,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:49,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:49,166 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-03 08:53:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:49,258 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:49,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:49,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:49,259 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:49,259 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:49,259 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 [2018-10-03 08:53:49,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:49,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-03 08:53:49,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:49,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:49,297 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:49,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:49,298 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:49,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:49,298 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:49,298 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:49,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-10-03 08:53:49,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:49,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:49,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:49,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:49,366 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 [2018-10-03 08:53:49,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:49,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:49,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:49,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:49,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:49,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:49,412 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:49,516 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:49,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:49,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:49,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:49,516 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:49,516 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:49,517 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 [2018-10-03 08:53:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-03 08:53:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:49,552 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:49,552 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:49,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:49,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:49,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:49,552 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:49,553 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:49,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-10-03 08:53:49,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:49,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:49,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:49,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,648 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:49,648 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 [2018-10-03 08:53:49,655 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:49,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:49,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:49,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:49,670 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:49,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:49,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:49,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:49,694 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:49,807 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:49,807 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:49,808 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:49,808 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:49,808 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 [2018-10-03 08:53:49,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:49,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-03 08:53:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:49,845 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:49,845 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:49,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:49,845 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:49,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:49,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:49,846 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:49,846 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:49,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-10-03 08:53:49,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:49,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:49,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:49,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:49,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:49,906 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:49,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:53:49,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:49,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:49,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:49,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:49,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:49,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:49,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:49,944 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:50,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:50,041 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:50,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:50,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:50,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:50,042 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:50,042 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:50,043 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 [2018-10-03 08:53:50,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:50,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-03 08:53:50,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:50,075 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-03 08:53:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:50,075 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:50,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:50,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:50,075 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:50,076 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:50,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:50,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-10-03 08:53:50,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:50,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:50,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,077 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:50,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:50,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:50,145 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 [2018-10-03 08:53:50,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:50,159 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:50,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:50,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:50,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:50,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:50,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:50,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:50,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:50,184 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-03 08:53:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:50,271 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:50,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:50,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:50,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:50,272 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:50,272 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:50,273 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 [2018-10-03 08:53:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-03 08:53:50,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:50,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:50,313 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:50,314 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:50,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:50,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:50,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:50,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:50,314 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:50,314 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:50,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:50,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-10-03 08:53:50,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:50,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:50,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:50,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:50,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:50,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:50,409 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:50,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:53:50,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:50,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:50,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:50,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:50,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:50,443 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:50,521 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:50,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:50,521 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:50,522 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:50,522 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:50,522 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 [2018-10-03 08:53:50,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-03 08:53:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:50,557 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:50,557 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:50,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:50,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:50,557 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:50,558 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:50,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:50,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-10-03 08:53:50,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:50,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:50,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:50,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:50,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:50,807 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 [2018-10-03 08:53:50,817 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:50,825 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:50,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:50,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:50,850 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:50,850 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:50,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:50,851 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:50,916 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:50,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:50,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:50,916 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:50,916 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:50,917 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 [2018-10-03 08:53:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-03 08:53:50,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:50,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:50,954 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:50,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:50,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:50,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:50,955 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:50,955 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:50,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:50,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-10-03 08:53:50,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:50,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:50,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:50,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:51,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:51,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:51,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:51,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:51,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:51,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:51,051 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:51,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:51,121 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-03 08:53:51,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:51,122 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:51,122 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:53:51,122 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:53:51,123 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 [2018-10-03 08:53:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:53:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-03 08:53:51,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:51,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:51,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-03 08:53:51,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:51,148 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:51,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:51,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:51,149 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:53:51,149 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:51,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-10-03 08:53:51,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:51,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:51,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,150 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:51,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:51,221 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 [2018-10-03 08:53:51,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:51,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:51,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:51,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:51,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:51,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:51,261 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-03 08:53:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:51,368 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:51,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:51,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:51,368 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:51,368 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:51,369 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 [2018-10-03 08:53:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:51,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-03 08:53:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:51,410 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:51,410 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:51,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:51,411 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:51,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:51,411 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:51,411 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:51,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-10-03 08:53:51,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:51,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:51,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:51,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:51,477 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 [2018-10-03 08:53:51,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:51,496 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:53:51,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:51,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:51,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:51,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:51,521 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:51,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:51,636 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:51,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:51,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:51,637 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:51,637 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:51,637 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 [2018-10-03 08:53:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-03 08:53:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:51,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:51,679 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:51,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:51,680 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:51,680 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:51,680 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:51,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:51,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-10-03 08:53:51,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:51,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:51,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:51,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:51,730 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 [2018-10-03 08:53:51,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:51,742 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:51,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:51,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:51,765 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:51,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:51,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:51,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:51,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:51,766 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:51,866 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:51,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:51,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:51,867 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:51,867 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:51,867 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 [2018-10-03 08:53:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-03 08:53:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:51,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:51,910 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:51,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:51,910 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:51,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:51,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:51,911 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:51,911 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:51,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:51,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-10-03 08:53:51,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:51,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:51,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:51,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:52,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:52,109 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:52,117 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:53:52,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:52,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:52,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:52,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:52,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:52,141 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:52,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:52,256 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:52,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:52,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:52,257 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:52,257 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:52,257 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 [2018-10-03 08:53:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-10-03 08:53:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:52,294 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-03 08:53:52,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:52,294 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:52,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:52,294 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:52,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:52,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:52,294 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:52,294 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:52,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-10-03 08:53:52,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:52,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:52,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:52,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:52,346 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 [2018-10-03 08:53:52,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:52,363 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:52,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:52,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:52,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:52,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:52,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:52,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:52,387 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-03 08:53:52,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:52,530 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:52,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:52,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:52,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:52,531 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:52,531 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:52,531 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 [2018-10-03 08:53:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-03 08:53:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:52,581 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:52,582 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:52,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:52,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:52,582 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:52,582 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:52,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:52,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-10-03 08:53:52,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:52,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:52,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:52,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:52,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:52,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:52,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,740 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:52,740 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:52,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:52,741 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:52,853 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:52,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:52,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:52,854 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:52,854 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:52,854 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 [2018-10-03 08:53:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:52,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-03 08:53:52,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:52,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:52,899 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:52,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:52,899 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:52,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:52,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:52,900 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:52,900 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:52,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-10-03 08:53:52,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:52,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:52,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:52,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:52,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:52,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:52,978 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 [2018-10-03 08:53:52,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:52,991 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:52,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:52,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:53,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:53,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:53,016 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:53,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:53,124 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:53:53,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:53,124 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:53,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:53,125 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:53:53,125 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:53:53,126 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 [2018-10-03 08:53:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:53:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-03 08:53:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:53,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:53,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:53,170 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:53,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:53,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:53,171 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:53,171 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:53,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:53,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-10-03 08:53:53,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:53,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:53,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:53,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:53,230 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 [2018-10-03 08:53:53,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:53,247 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:53:53,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:53,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:53,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:53,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:53,275 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:53,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:53,378 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:53,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:53,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:53,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:53,379 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:53,379 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:53,379 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 [2018-10-03 08:53:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-10-03 08:53:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:53:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:53:53,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-03 08:53:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:53,411 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:53:53,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:53:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:53,411 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:53,411 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:53,411 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:53,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-10-03 08:53:53,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:53,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:53,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:53,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,459 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:53,459 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 [2018-10-03 08:53:53,469 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:53,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:53,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:53,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:53,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:53,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:53,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:53,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:53,499 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-03 08:53:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:53,598 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:53,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:53,598 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:53,599 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:53,599 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:53,599 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 [2018-10-03 08:53:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-03 08:53:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:53,645 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:53,645 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:53,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:53,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:53,646 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:53,646 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:53,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:53,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-10-03 08:53:53,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:53,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:53,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:53,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:53,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:53,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:53,726 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:53:53,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:53,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:53,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:53,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:53,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:53,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:53,750 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:53,853 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:53,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:53,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:53,853 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:53,854 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:53,854 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 [2018-10-03 08:53:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:53,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-10-03 08:53:53,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:53,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:53,901 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:53,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:53,901 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:53,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:53,901 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:53,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:53,901 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:53,901 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:53,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:53,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-10-03 08:53:53,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:53,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:53,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:53,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:53,984 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:53,984 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 [2018-10-03 08:53:53,992 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:54,000 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:54,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:54,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:54,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:54,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:54,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:54,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:54,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:54,030 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:54,152 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:53:54,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:54,152 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:54,153 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:53:54,153 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:53:54,153 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 [2018-10-03 08:53:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:53:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-03 08:53:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:54,217 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:54,217 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:54,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:54,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:54,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:54,218 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:54,218 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:54,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-10-03 08:53:54,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:54,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:54,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:54,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:54,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:54,325 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 [2018-10-03 08:53:54,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:54,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:54,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:54,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:54,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:54,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:54,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:54,361 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:54,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:54,452 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:53:54,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:54,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:54,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:54,453 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:53:54,453 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:53:54,453 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 [2018-10-03 08:53:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:53:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-10-03 08:53:54,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:54,490 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-03 08:53:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:54,491 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:54,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:54,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:54,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:54,491 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:54,491 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:54,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:54,491 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-10-03 08:53:54,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:54,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:54,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:54,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:54,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:54,649 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 [2018-10-03 08:53:54,657 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:54,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:54,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:54,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:54,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:54,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:54,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:54,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:54,687 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-03 08:53:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:54,779 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:54,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:54,779 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:54,780 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:54,780 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:54,780 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 [2018-10-03 08:53:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:54,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-10-03 08:53:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:54,822 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:54,823 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:54,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:54,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:54,823 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:54,823 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:54,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:54,824 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-10-03 08:53:54,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:54,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:54,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:54,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:54,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:54,965 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 [2018-10-03 08:53:54,972 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:54,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:53:54,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:54,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:55,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:55,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:55,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:55,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:55,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:55,008 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:55,112 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:53:55,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:55,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:55,113 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:53:55,113 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:53:55,113 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 [2018-10-03 08:53:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:53:55,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-10-03 08:53:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:55,156 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:55,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:55,156 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:55,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:55,156 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:55,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:55,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:55,156 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:55,157 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:55,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:55,157 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-10-03 08:53:55,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:55,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:55,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:55,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:55,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:55,245 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 [2018-10-03 08:53:55,252 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:55,256 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:55,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:55,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:55,260 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:55,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:55,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:55,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:55,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:55,281 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:55,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:55,368 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-10-03 08:53:55,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:55,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:55,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:55,368 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:53:55,368 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:53:55,369 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 [2018-10-03 08:53:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:53:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-03 08:53:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:55,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:55,420 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:55,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:55,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:55,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:55,420 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:53:55,420 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:55,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:55,421 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-10-03 08:53:55,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:55,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:55,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:55,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:55,479 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 [2018-10-03 08:53:55,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:55,494 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:53:55,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:55,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:55,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:55,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:55,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:55,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:55,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:55,519 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:55,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:55,601 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-10-03 08:53:55,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:55,601 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:55,602 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:53:55,602 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:53:55,602 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 [2018-10-03 08:53:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:53:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-10-03 08:53:55,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:53:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:53:55,633 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-03 08:53:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:55,634 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:53:55,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:53:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:55,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:55,634 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:53:55,634 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:55,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:55,634 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-10-03 08:53:55,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:55,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:55,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:55,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:55,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:55,685 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 [2018-10-03 08:53:55,694 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:55,702 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:55,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:55,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:55,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:55,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:55,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:55,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:55,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:55,726 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-10-03 08:53:55,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:55,878 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:53:55,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:55,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:55,879 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:53:55,879 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:53:55,879 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 [2018-10-03 08:53:55,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:53:55,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:53:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:53:55,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:53:55,934 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:53:55,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:55,934 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:53:55,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:55,935 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:53:55,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:55,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:55,935 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:55,935 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:55,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:55,936 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-10-03 08:53:55,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:55,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:55,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:55,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:56,038 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 [2018-10-03 08:53:56,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:56,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:56,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:56,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:56,074 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:53:56,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:56,210 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:53:56,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:56,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:56,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:56,210 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:53:56,210 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:53:56,211 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 [2018-10-03 08:53:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:53:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-03 08:53:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:56,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:56,265 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:56,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:56,266 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:56,266 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:56,266 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:56,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:56,266 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-10-03 08:53:56,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:56,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:56,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:56,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:56,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:56,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:56,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:56,389 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:56,389 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:56,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:56,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:56,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:56,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:56,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:56,415 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:56,576 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:53:56,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:56,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:56,577 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:53:56,577 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:53:56,577 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 [2018-10-03 08:53:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:53:56,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:53:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:53:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:53:56,634 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:53:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:56,634 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:53:56,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:53:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:56,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:56,635 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:56,635 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:56,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:56,635 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-10-03 08:53:56,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:56,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:56,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:56,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:56,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,697 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:56,697 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:56,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:53:56,712 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:53:56,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:56,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:56,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:56,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:56,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:56,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:56,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:56,738 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:53:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:56,942 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:53:56,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:56,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:56,943 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:53:56,943 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:53:56,943 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 [2018-10-03 08:53:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:53:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-03 08:53:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:53:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:53:57,021 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:53:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:57,022 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:53:57,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:53:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:57,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:57,022 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:57,022 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:57,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:57,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-10-03 08:53:57,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:57,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:57,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:57,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:57,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:57,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:57,808 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:57,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:57,808 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 [2018-10-03 08:53:57,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:53:57,855 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:53:57,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:57,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:57,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:57,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:57,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:57,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:57,896 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:53:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:58,426 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:53:58,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:58,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:58,427 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:53:58,427 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:53:58,427 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 [2018-10-03 08:53:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:53:58,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:53:58,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:53:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:53:58,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:53:58,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:58,484 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:53:58,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:53:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:58,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:58,485 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:58,485 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:58,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-10-03 08:53:58,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:58,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:58,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:58,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:58,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:58,645 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:58,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:58,645 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 [2018-10-03 08:53:58,652 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:53:58,658 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:53:58,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:58,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:58,681 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:58,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:58,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:58,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:58,682 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:53:58,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:58,850 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:53:58,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:58,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:58,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:58,851 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:53:58,851 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:53:58,852 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 [2018-10-03 08:53:58,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:53:58,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-03 08:53:58,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:53:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:53:58,916 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:53:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:58,916 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:53:58,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:58,916 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:53:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:58,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:58,916 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:53:58,917 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:58,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-10-03 08:53:58,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:58,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:58,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:58,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:58,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:59,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:53:59,019 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:53:59,027 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:53:59,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:59,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:59,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:59,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:59,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:59,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:59,051 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:53:59,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:59,210 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:53:59,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:59,210 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:59,211 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:53:59,212 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:53:59,212 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 [2018-10-03 08:53:59,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:53:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-03 08:53:59,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:53:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:53:59,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:53:59,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:59,279 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:53:59,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:59,279 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:53:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:59,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:59,280 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:59,280 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:59,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:59,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-10-03 08:53:59,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:59,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:59,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:59,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:53:59,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,376 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:59,376 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 [2018-10-03 08:53:59,383 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:59,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:59,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:59,414 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:53:59,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:53:59,567 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:53:59,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:53:59,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:53:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:53:59,568 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:53:59,568 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:53:59,568 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 [2018-10-03 08:53:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:53:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-10-03 08:53:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:53:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:53:59,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-03 08:53:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:53:59,610 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:53:59,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:53:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:53:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:53:59,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:53:59,610 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:53:59,610 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:53:59,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:53:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-10-03 08:53:59,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:53:59,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:53:59,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:59,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:53:59,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:53:59,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:53:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:53:59,841 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 [2018-10-03 08:53:59,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:53:59,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:53:59,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:53:59,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:53:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:53:59,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:53:59,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:53:59,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:53:59,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:53:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:53:59,876 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-03 08:54:00,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:00,072 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:00,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:00,072 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:00,072 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:00,072 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:00,073 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 [2018-10-03 08:54:00,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:00,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:54:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:00,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:00,130 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:00,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:00,131 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:00,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:00,131 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:00,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:00,131 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:00,131 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:54:00,131 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:00,131 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-10-03 08:54:00,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:00,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:00,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:00,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:00,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:00,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:00,189 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 [2018-10-03 08:54:00,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:00,205 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:54:00,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:00,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:00,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:00,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:00,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:00,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:00,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:00,229 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:00,456 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:00,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:00,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:00,457 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:00,457 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:00,457 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 [2018-10-03 08:54:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-03 08:54:00,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:00,558 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:54:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:00,558 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:00,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:00,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:00,559 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:54:00,559 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:00,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:00,560 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-10-03 08:54:00,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:00,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:00,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:00,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:00,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:00,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:00,920 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 [2018-10-03 08:54:00,926 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:00,931 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:00,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:00,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:00,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:00,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:00,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:00,956 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:54:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:01,106 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:01,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:01,106 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:01,106 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:01,107 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:01,107 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 [2018-10-03 08:54:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:54:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:01,171 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:01,172 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:01,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:01,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:01,172 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:01,172 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:01,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-10-03 08:54:01,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:01,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:01,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:01,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:01,272 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 [2018-10-03 08:54:01,280 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:01,291 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:54:01,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:01,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:01,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:01,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:01,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:01,316 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:01,461 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:01,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:01,461 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:01,461 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:01,461 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:01,462 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 [2018-10-03 08:54:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-03 08:54:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:01,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:01,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:54:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:01,514 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:01,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:01,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:01,514 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:54:01,514 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:01,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-10-03 08:54:01,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:01,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:01,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:01,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:01,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:01,585 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:01,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:54:01,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:01,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,617 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:01,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:01,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:01,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:01,617 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:54:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:01,765 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:01,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:01,765 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:01,765 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:01,765 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:01,766 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 [2018-10-03 08:54:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:54:01,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:01,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:01,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:01,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:01,823 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:01,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:01,823 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:01,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:01,823 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:01,824 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:01,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:01,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-10-03 08:54:01,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:01,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:01,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:01,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:01,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:01,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:01,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:01,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:01,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:01,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:01,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:01,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:01,938 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:02,093 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:02,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:02,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:02,094 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:02,094 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:02,094 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 [2018-10-03 08:54:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-03 08:54:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:02,152 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:54:02,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:02,153 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:02,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:02,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:02,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:02,153 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:02,153 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:02,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:02,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-10-03 08:54:02,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:02,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:02,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:02,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:02,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:02,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:02,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:02,230 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:02,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:02,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:02,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:02,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:02,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:02,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:02,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:02,261 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:54:02,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:02,411 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:02,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:02,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:02,412 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:02,412 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:02,412 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 [2018-10-03 08:54:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-03 08:54:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:02,478 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:02,478 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:02,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:02,478 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:02,478 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:54:02,478 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:02,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:02,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-10-03 08:54:02,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:02,479 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:02,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:02,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:02,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:02,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:02,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:02,553 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 [2018-10-03 08:54:02,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:02,569 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:54:02,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:02,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:02,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:02,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:02,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:02,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:02,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:02,596 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:02,742 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:02,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:02,742 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:02,743 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:02,743 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:02,743 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 [2018-10-03 08:54:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:02,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-10-03 08:54:02,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:54:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:54:02,790 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-10-03 08:54:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:02,790 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:54:02,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:02,790 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:54:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:02,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:02,790 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:02,790 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:02,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:02,791 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-10-03 08:54:02,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:02,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:02,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:02,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:02,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:02,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:02,851 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 [2018-10-03 08:54:02,858 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:02,864 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:02,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:02,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:02,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:02,895 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:02,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:02,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:02,896 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-10-03 08:54:03,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:03,110 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:03,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:03,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:03,110 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:03,111 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:03,111 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 [2018-10-03 08:54:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:03,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-03 08:54:03,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:03,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:03,181 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:03,182 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:03,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:03,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:03,182 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:54:03,182 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:03,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:03,182 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-10-03 08:54:03,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:03,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:03,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:03,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:03,245 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 [2018-10-03 08:54:03,253 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:03,260 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:54:03,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:03,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:03,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:03,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:03,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:03,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:03,285 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:03,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:03,480 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:03,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:03,481 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:03,482 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:03,482 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:03,482 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 [2018-10-03 08:54:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-03 08:54:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:03,550 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:54:03,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:03,550 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:03,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:03,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:03,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:03,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:03,551 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:54:03,551 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:03,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-10-03 08:54:03,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:03,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:03,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:03,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,607 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:03,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:03,615 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:03,623 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:54:03,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:03,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:03,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:03,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:03,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:03,649 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:54:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:03,808 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:03,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:03,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:03,809 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:03,809 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:03,809 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 [2018-10-03 08:54:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-03 08:54:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:03,887 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:03,887 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:03,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:03,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:03,888 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:03,888 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:03,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:03,888 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-10-03 08:54:03,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:03,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:03,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:03,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:03,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:03,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:03,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:03,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:03,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:03,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:03,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:03,977 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:04,123 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:04,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:04,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:04,127 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:04,127 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:04,127 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 [2018-10-03 08:54:04,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-10-03 08:54:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:04,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:54:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:04,185 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:04,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:04,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:04,186 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:54:04,186 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:04,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:04,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-10-03 08:54:04,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:04,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:04,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:04,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:04,238 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 [2018-10-03 08:54:04,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:04,249 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:04,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:04,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:04,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:04,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:04,273 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:54:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:04,425 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:04,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:04,425 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:04,426 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:04,426 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:04,426 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 [2018-10-03 08:54:04,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:04,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-03 08:54:04,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:04,502 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:04,502 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:04,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:04,503 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:04,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:04,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:04,503 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:04,503 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:04,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:04,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-10-03 08:54:04,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:04,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:04,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:04,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:04,561 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 [2018-10-03 08:54:04,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:04,576 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:54:04,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:04,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:04,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:04,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:04,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:04,600 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:04,752 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:04,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:04,752 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:04,753 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:04,753 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:04,753 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 [2018-10-03 08:54:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-03 08:54:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:04,823 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:54:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:04,823 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:04,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:04,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:04,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:04,823 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:04,823 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:04,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-10-03 08:54:04,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:04,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:04,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:04,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:04,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:04,993 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 [2018-10-03 08:54:05,000 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:05,008 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:05,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:05,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,031 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:05,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:05,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:05,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:05,031 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:54:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:05,186 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:05,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:05,186 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:05,186 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:05,187 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:05,187 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 [2018-10-03 08:54:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:05,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-03 08:54:05,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:05,250 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:05,250 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:05,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:05,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:05,251 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:54:05,251 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:05,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-10-03 08:54:05,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:05,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:05,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:05,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:05,304 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 [2018-10-03 08:54:05,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:05,318 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:54:05,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:05,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,323 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:05,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:05,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:05,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:05,353 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:05,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:05,766 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:05,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:05,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:05,766 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:05,767 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:05,767 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 [2018-10-03 08:54:05,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:05,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-10-03 08:54:05,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:54:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:54:05,820 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-10-03 08:54:05,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:05,820 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:54:05,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:54:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:05,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:05,820 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-10-03 08:54:05,820 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:05,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-10-03 08:54:05,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:05,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:05,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:05,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,872 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:05,872 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 [2018-10-03 08:54:05,880 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:05,888 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:54:05,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:05,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:05,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:05,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:05,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:05,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:05,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:05,914 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-10-03 08:54:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:06,057 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:06,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:06,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:06,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:06,057 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:06,057 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:06,058 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 [2018-10-03 08:54:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-03 08:54:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:06,127 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:06,127 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:06,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:06,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:06,128 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:06,128 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:06,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-10-03 08:54:06,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:06,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:06,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:06,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:06,471 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 [2018-10-03 08:54:06,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:06,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:06,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:06,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:06,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:06,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:06,509 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:06,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:06,640 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:54:06,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:06,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:06,641 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:06,641 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:06,641 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 [2018-10-03 08:54:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-10-03 08:54:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:06,718 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:54:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:06,718 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:06,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:06,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:06,719 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:06,719 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:06,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-10-03 08:54:06,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:06,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:06,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:06,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:06,774 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 [2018-10-03 08:54:06,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:06,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:06,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:06,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:06,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:06,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:06,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:06,813 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:54:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:06,965 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:06,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:06,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:06,966 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:06,966 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:06,966 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 [2018-10-03 08:54:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-03 08:54:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:07,044 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:07,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:07,045 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:07,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:07,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:07,045 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:54:07,045 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:07,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:07,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-10-03 08:54:07,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:07,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:07,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:07,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:07,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:07,147 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:07,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-03 08:54:07,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:07,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:07,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:07,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:07,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:07,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:07,180 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:07,310 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:54:07,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:07,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:07,311 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:07,311 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:07,312 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 [2018-10-03 08:54:07,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:07,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-10-03 08:54:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:07,416 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-10-03 08:54:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:07,416 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:07,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:07,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:07,417 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-10-03 08:54:07,417 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:07,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:07,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-10-03 08:54:07,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:07,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:07,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:07,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,737 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:07,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:07,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:07,756 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:07,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:07,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:07,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:07,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:07,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:07,779 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-10-03 08:54:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:07,909 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:54:07,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:07,914 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:07,915 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:54:07,915 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:54:07,915 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 [2018-10-03 08:54:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:54:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-10-03 08:54:07,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:07,990 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:07,990 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:07,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:07,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:07,990 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:54:07,990 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:07,991 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:07,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-10-03 08:54:07,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:07,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:07,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:07,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,046 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:08,046 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 [2018-10-03 08:54:08,053 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:08,062 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:54:08,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:08,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:08,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:08,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:08,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:08,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:08,087 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:08,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:08,222 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:54:08,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:08,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:08,223 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:54:08,223 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:54:08,223 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 [2018-10-03 08:54:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:54:08,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-10-03 08:54:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:08,299 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-10-03 08:54:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:08,299 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:08,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:08,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:08,299 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-10-03 08:54:08,300 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:08,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:08,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-10-03 08:54:08,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:08,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:08,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:08,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,353 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:08,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:08,362 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:08,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:54:08,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:08,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:08,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:08,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:08,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:08,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:08,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:08,396 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-10-03 08:54:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:08,535 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-10-03 08:54:08,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:08,535 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:08,536 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:54:08,536 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:54:08,537 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 [2018-10-03 08:54:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:54:08,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-10-03 08:54:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:08,634 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-10-03 08:54:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:08,634 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:08,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:54:08,634 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:08,634 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-10-03 08:54:08,634 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:08,634 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:08,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-10-03 08:54:08,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:08,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:08,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:08,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,438 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:09,438 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 [2018-10-03 08:54:09,453 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:09,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:54:09,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:09,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:09,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:09,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:54:09,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:54:09,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:54:09,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:54:09,584 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-10-03 08:54:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:09,857 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-10-03 08:54:09,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:54:09,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-10-03 08:54:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:09,858 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:54:09,858 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:54:09,858 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 [2018-10-03 08:54:09,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:54:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-10-03 08:54:09,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:54:09,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-10-03 08:54:09,930 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-10-03 08:54:09,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:09,930 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-10-03 08:54:09,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:54:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-10-03 08:54:09,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:09,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:09,931 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-03 08:54:09,931 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:09,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:09,932 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-10-03 08:54:09,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:09,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:09,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:09,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:10,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:10,202 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 [2018-10-03 08:54:10,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:10,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:10,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:10,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:10,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:10,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:10,247 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-10-03 08:54:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:10,458 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:10,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:10,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:10,460 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:10,460 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:10,460 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 [2018-10-03 08:54:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:10,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:10,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:10,555 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:10,555 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:10,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:10,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:10,556 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:10,556 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:10,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:10,556 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-10-03 08:54:10,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:10,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:10,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:10,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:10,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:10,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:10,727 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 [2018-10-03 08:54:10,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:10,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:10,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:10,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:10,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:10,770 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:10,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:10,965 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:10,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:10,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:10,966 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:10,966 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:10,966 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 [2018-10-03 08:54:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:54:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:11,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:11,059 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:11,060 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:11,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:11,060 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:11,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:11,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:11,060 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:11,060 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:11,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:11,061 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-10-03 08:54:11,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:11,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:11,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:11,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:11,119 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 [2018-10-03 08:54:11,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:11,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:11,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:11,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:11,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:11,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:11,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:11,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:11,160 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:11,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:11,379 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:11,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:11,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:11,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:11,380 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:11,380 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:11,380 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 [2018-10-03 08:54:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:11,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:11,471 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:11,471 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:11,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:11,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:11,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:11,471 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:11,471 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:11,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-10-03 08:54:11,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:11,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:11,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:11,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:11,542 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 [2018-10-03 08:54:11,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:11,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:11,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:11,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:11,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:11,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:11,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:11,582 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:11,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:11,779 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:11,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:11,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:11,780 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:11,780 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:11,780 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 [2018-10-03 08:54:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:11,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-03 08:54:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:11,862 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:11,863 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:11,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:11,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:11,863 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:11,863 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:11,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-10-03 08:54:11,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:11,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:11,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:11,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,924 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:11,924 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:11,932 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:11,939 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:11,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:11,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:11,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:11,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:11,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:11,963 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:12,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:12,170 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:12,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:12,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:12,171 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:12,171 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:12,171 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 [2018-10-03 08:54:12,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:12,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-03 08:54:12,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:12,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:12,282 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:12,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:12,282 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:12,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:12,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:12,283 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:12,283 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:12,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:12,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-10-03 08:54:12,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:12,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:12,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:12,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:12,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:12,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:12,405 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:12,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:12,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:12,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:12,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:12,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:12,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:12,431 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:12,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:12,644 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:12,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:12,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:12,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:12,645 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:12,645 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:12,645 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 [2018-10-03 08:54:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-03 08:54:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:12,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:12,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:12,739 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:12,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:12,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:12,740 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:12,740 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:12,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-10-03 08:54:12,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:12,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:12,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:12,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:12,810 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 [2018-10-03 08:54:12,819 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:12,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:12,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:12,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:12,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:12,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:12,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:12,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:12,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:12,855 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:13,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:13,050 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:13,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:13,056 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:13,056 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:13,056 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:13,056 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 [2018-10-03 08:54:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:13,145 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:13,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:13,145 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:13,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:13,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:13,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:13,146 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:13,146 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:13,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-10-03 08:54:13,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:13,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:13,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:13,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:13,208 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 [2018-10-03 08:54:13,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:13,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:13,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:13,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:13,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:13,244 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:13,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:13,438 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:13,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:13,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:13,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:13,439 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:13,439 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:13,439 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 [2018-10-03 08:54:13,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:13,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-03 08:54:13,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:13,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-03 08:54:13,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:13,516 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:13,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:13,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:13,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:13,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:13,517 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:13,517 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:13,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:13,517 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-10-03 08:54:13,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:13,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:13,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:13,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:13,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:13,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:13,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:13,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:13,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:13,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:13,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:13,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:13,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:13,633 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-03 08:54:13,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:13,853 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:13,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:13,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:13,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:13,854 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:13,854 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:13,854 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 [2018-10-03 08:54:13,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:13,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:13,953 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:13,953 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:13,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:13,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:13,954 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:13,954 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:13,954 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:13,954 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-10-03 08:54:13,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:13,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:13,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:13,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:14,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:14,014 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 [2018-10-03 08:54:14,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:14,034 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:14,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:14,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:14,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:14,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:14,058 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:14,283 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:14,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:14,283 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:14,284 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:14,284 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:14,284 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 [2018-10-03 08:54:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:54:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:14,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:14,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:14,380 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:14,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:14,380 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:14,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:14,381 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:14,381 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:14,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:14,381 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-10-03 08:54:14,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:14,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:14,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:14,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:14,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:14,472 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:14,478 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:14,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:14,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:14,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:14,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:14,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:14,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:14,503 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:14,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:14,714 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:14,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:14,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:14,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:14,714 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:14,714 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:14,715 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 [2018-10-03 08:54:14,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:14,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:14,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:14,813 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:14,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:14,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:14,814 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:14,814 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:14,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-10-03 08:54:14,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:14,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:14,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:14,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:14,914 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 [2018-10-03 08:54:14,924 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:14,931 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:14,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:14,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:14,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:14,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:14,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:14,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:14,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:14,957 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:15,175 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:15,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:15,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:15,175 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:15,175 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:15,176 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 [2018-10-03 08:54:15,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-03 08:54:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:15,264 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:15,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:15,264 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:15,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:15,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:15,265 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:15,265 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:15,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:15,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-10-03 08:54:15,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:15,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:15,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:15,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:15,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:15,378 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:15,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:15,385 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:15,394 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:15,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:15,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:15,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:15,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:15,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:15,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:15,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:15,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:15,422 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:15,622 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:15,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:15,622 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:15,623 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:15,623 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:15,623 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 [2018-10-03 08:54:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-03 08:54:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:15,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:15,721 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:15,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:15,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:15,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:15,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:15,722 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:15,722 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:15,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:15,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-10-03 08:54:15,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:15,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:15,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:15,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:15,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:16,122 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 [2018-10-03 08:54:16,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:16,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:16,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:16,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:16,194 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:16,527 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:16,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:16,527 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:16,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:16,528 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:16,528 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:16,528 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 [2018-10-03 08:54:16,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:16,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-03 08:54:16,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:16,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:16,626 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:16,626 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:16,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:16,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:16,627 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:16,627 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:16,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:16,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-10-03 08:54:16,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:16,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:16,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:16,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:16,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:16,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:16,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:16,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:16,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:16,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:16,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:16,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:16,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:16,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:16,738 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:16,943 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:16,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:16,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:16,944 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:16,944 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:16,944 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 [2018-10-03 08:54:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:17,055 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:17,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:17,055 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:17,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:17,055 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:17,055 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:17,055 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:17,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:17,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-10-03 08:54:17,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:17,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:17,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:17,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:17,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:17,149 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 [2018-10-03 08:54:17,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:17,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:17,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:17,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:17,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:17,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:17,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:17,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:17,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:17,192 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:17,401 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:17,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:17,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:17,402 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:17,402 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:17,402 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 [2018-10-03 08:54:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:17,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-03 08:54:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:54:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:54:17,480 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-03 08:54:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:17,480 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:54:17,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:17,480 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:54:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:17,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:17,481 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:17,481 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:17,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-10-03 08:54:17,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:17,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:17,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:17,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:17,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:17,548 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 [2018-10-03 08:54:17,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:17,561 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:17,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:17,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:17,585 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:17,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:17,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:17,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:17,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:17,585 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-03 08:54:17,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:17,797 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:17,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:17,797 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:17,798 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:17,798 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:17,798 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 [2018-10-03 08:54:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:17,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:17,901 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:17,901 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:17,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:17,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:17,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:17,901 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:17,901 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:17,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-10-03 08:54:17,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:17,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:17,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:17,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:17,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:17,963 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 [2018-10-03 08:54:17,970 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:17,979 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:17,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:17,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:18,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:18,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:18,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:18,004 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:18,222 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:18,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:18,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:18,223 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:18,223 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:18,223 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 [2018-10-03 08:54:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:18,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:54:18,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:18,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:18,321 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:18,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:18,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:18,321 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:18,321 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:18,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-10-03 08:54:18,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:18,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:18,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:18,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:18,383 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 [2018-10-03 08:54:18,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:18,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:18,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:18,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:18,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:18,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:18,427 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:18,619 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:18,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:18,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:18,620 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:18,620 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:18,620 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 [2018-10-03 08:54:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-03 08:54:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:18,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:18,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:18,738 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:18,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:18,738 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:18,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:18,738 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:18,739 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:18,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:18,739 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-10-03 08:54:18,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:18,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:18,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:18,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:18,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:18,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:18,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:18,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:18,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:18,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:18,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:18,842 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:19,034 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:19,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:19,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:19,034 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:19,035 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:19,035 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 [2018-10-03 08:54:19,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:19,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-03 08:54:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:19,123 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:19,123 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:19,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:19,123 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:19,124 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:19,124 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:19,124 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:19,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-10-03 08:54:19,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:19,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:19,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:19,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:19,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,294 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:19,294 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 [2018-10-03 08:54:19,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:19,307 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:19,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:19,308 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:19,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:19,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:19,331 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:19,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:19,534 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:19,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:19,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:19,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:19,535 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:19,535 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:19,535 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 [2018-10-03 08:54:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:19,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:19,647 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:19,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:19,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:19,648 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:19,648 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:19,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-10-03 08:54:19,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:19,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:19,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:19,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:19,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:19,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:19,735 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 [2018-10-03 08:54:19,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:19,753 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:19,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:19,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:19,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:19,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:19,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:19,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:19,779 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:20,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:20,001 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:20,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:20,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:20,002 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:20,002 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:20,002 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 [2018-10-03 08:54:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:54:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:20,114 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:20,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:20,115 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:20,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:20,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:20,115 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:20,115 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:20,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-10-03 08:54:20,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:20,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:20,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:20,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:20,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:20,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:20,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:20,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:20,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:20,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:20,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:20,277 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:20,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:20,278 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:20,461 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:20,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:20,461 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:20,462 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:20,462 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:20,462 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 [2018-10-03 08:54:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:20,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-03 08:54:20,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:20,584 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:20,584 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:20,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:20,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:20,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:20,585 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:20,585 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:20,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:20,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-10-03 08:54:20,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:20,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:20,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:20,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:20,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:20,677 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 [2018-10-03 08:54:20,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:20,692 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:20,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:20,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:20,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:20,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:20,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:20,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:20,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:20,717 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:20,909 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:20,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:20,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:20,910 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:20,910 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:20,910 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 [2018-10-03 08:54:20,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-03 08:54:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:20,996 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-03 08:54:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:20,996 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:20,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:20,996 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:20,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:20,996 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:20,996 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:20,997 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-10-03 08:54:20,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:20,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:20,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:20,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:21,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:21,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:21,066 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:21,075 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:21,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:21,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:21,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:21,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:21,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:21,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:21,100 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-03 08:54:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:21,308 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:21,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:21,308 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:21,309 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:21,309 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:21,309 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 [2018-10-03 08:54:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-03 08:54:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:21,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:21,414 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:21,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:21,414 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:21,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:21,414 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:21,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:21,414 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:21,415 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:21,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:21,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-10-03 08:54:21,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:21,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:21,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:21,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:21,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:21,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:21,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:21,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:21,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:21,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:21,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:21,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:21,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:21,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:21,707 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:21,904 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:21,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:21,904 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:21,905 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:21,905 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:21,906 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 [2018-10-03 08:54:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-03 08:54:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:22,022 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:22,022 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:22,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:22,022 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:22,022 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:22,023 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:22,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-10-03 08:54:22,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:22,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:22,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:22,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:22,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:22,110 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 [2018-10-03 08:54:22,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:22,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:22,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:22,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:22,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:22,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:22,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:22,163 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:22,385 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:22,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:22,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:22,386 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:22,386 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:22,386 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 [2018-10-03 08:54:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-03 08:54:22,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:22,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:22,511 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:22,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:22,511 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:22,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:22,511 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:22,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:22,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:22,511 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:22,511 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:22,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-10-03 08:54:22,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:22,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:22,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:22,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:22,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:22,580 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 [2018-10-03 08:54:22,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:22,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:22,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:22,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:22,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:22,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:22,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:22,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:22,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:22,620 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:22,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:22,830 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:22,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:22,830 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:22,831 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:22,831 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:22,831 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 [2018-10-03 08:54:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:22,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-03 08:54:22,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:22,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:22,937 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:22,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:22,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:22,937 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:22,937 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:22,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:22,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-10-03 08:54:22,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:22,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:22,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:22,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:23,005 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 [2018-10-03 08:54:23,013 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:23,022 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:23,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:23,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:23,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:23,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:23,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:23,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:23,048 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:23,243 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:54:23,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:23,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:23,243 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:23,243 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:23,244 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 [2018-10-03 08:54:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-03 08:54:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:23,355 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:23,355 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:23,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:23,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:23,355 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:23,355 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:23,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-10-03 08:54:23,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:23,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:23,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:23,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:23,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:23,479 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 [2018-10-03 08:54:23,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:23,495 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:23,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:23,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,519 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:23,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:23,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:23,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:23,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:23,520 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:23,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:23,697 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:54:23,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:23,697 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:23,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:23,698 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:23,698 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:23,698 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 [2018-10-03 08:54:23,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:23,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-03 08:54:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:23,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:23,799 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:23,799 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:23,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:23,799 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:23,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:23,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:23,799 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:23,800 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:23,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:23,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-10-03 08:54:23,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:23,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:23,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:23,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:23,869 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 [2018-10-03 08:54:23,877 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:23,888 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:23,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:23,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:23,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:23,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:23,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:23,912 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:24,091 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:54:24,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:24,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:24,091 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:54:24,092 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:54:24,092 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 [2018-10-03 08:54:24,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:54:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-03 08:54:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:24,193 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:24,194 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:24,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:24,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:24,194 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:24,194 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:24,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:24,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-10-03 08:54:24,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:24,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:24,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:24,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:24,256 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 [2018-10-03 08:54:24,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:24,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:24,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:24,293 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:24,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:24,450 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-03 08:54:24,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:24,450 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:24,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:24,451 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:54:24,451 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:54:24,451 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 [2018-10-03 08:54:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:54:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-03 08:54:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:54:24,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:54:24,518 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-03 08:54:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:24,518 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:54:24,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:54:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:24,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:24,519 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:24,519 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:24,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-10-03 08:54:24,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:24,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:24,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:24,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:24,596 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 [2018-10-03 08:54:24,604 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:24,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:24,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:24,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:24,644 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:24,645 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:24,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:24,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:24,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:24,646 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-03 08:54:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:24,964 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:24,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:24,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:24,965 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:24,965 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:24,965 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 [2018-10-03 08:54:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:25,088 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:25,088 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:25,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:25,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:25,089 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:25,089 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:25,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-10-03 08:54:25,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:25,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:25,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:25,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:25,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:25,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:25,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:25,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:25,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:25,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:25,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:25,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:25,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:25,190 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:25,444 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:25,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:25,444 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:25,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:25,444 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:25,445 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:25,445 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 [2018-10-03 08:54:25,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:54:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:25,624 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:25,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:25,624 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:25,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:25,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:25,625 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:25,625 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:25,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-10-03 08:54:25,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:25,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:25,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:25,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:25,712 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 [2018-10-03 08:54:25,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:25,727 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:25,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:25,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:25,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:25,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:25,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:25,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:25,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:25,752 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:26,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:26,024 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:26,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:26,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:26,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:26,025 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:26,025 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:26,025 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 [2018-10-03 08:54:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:26,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:26,147 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:26,147 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:26,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:26,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:26,148 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:26,148 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:26,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:26,148 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-10-03 08:54:26,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:26,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:26,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:26,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:26,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:26,229 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:26,239 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:26,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:26,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:26,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:26,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:26,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:26,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:26,263 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:26,546 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:26,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:26,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:26,547 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:26,547 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:26,547 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 [2018-10-03 08:54:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-03 08:54:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:26,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:26,653 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:26,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:26,654 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:26,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:26,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:26,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:26,654 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:26,654 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:26,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:26,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-10-03 08:54:26,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:26,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:26,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:26,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:26,718 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 [2018-10-03 08:54:26,725 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:26,733 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:26,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:26,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:26,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:26,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:26,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:26,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:26,760 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:27,009 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:27,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:27,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:27,010 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:27,010 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:27,010 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 [2018-10-03 08:54:27,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:27,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-03 08:54:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:27,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:27,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:27,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:27,127 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:27,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:27,127 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:27,127 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:27,127 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:27,127 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:27,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:27,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-10-03 08:54:27,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:27,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:27,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:27,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:27,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:27,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:27,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:27,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:27,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:27,230 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:27,510 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:27,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:27,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:27,511 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:27,511 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:27,511 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 [2018-10-03 08:54:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-03 08:54:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:27,636 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:27,637 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:27,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:27,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:27,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:27,637 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:27,637 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:27,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-10-03 08:54:27,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:27,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:27,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:27,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:27,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:27,762 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 [2018-10-03 08:54:27,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:27,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:27,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:27,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:27,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:27,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:27,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:27,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:27,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:27,803 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:28,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:28,052 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:28,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:28,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:28,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:28,053 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:28,053 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:28,053 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 [2018-10-03 08:54:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:28,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:28,178 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:28,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:28,178 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:28,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:28,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:28,179 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:28,179 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:28,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:28,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-10-03 08:54:28,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:28,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:28,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:28,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:28,240 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 [2018-10-03 08:54:28,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:28,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:28,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:28,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:28,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:28,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:28,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:28,284 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:28,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:28,522 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:28,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:28,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:28,523 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:28,523 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:28,523 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 [2018-10-03 08:54:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-10-03 08:54:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:28,624 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-03 08:54:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:28,625 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:28,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:28,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:28,625 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:28,625 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:28,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:28,625 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-10-03 08:54:28,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:28,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:28,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:28,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:28,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:28,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:28,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:28,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:28,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:28,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:28,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:28,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:28,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:28,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:28,748 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-03 08:54:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:29,044 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:29,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:29,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:29,044 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:29,044 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:29,045 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 [2018-10-03 08:54:29,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:29,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:29,169 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:29,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:29,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:29,170 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:29,170 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:29,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-10-03 08:54:29,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:29,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:29,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:29,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:29,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:29,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:29,277 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:29,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:29,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,302 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:29,302 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:29,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:29,302 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:29,573 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:29,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:29,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:29,573 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:29,573 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:29,574 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 [2018-10-03 08:54:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-10-03 08:54:29,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:29,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:29,694 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:29,694 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:29,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:29,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:29,695 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:29,695 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:29,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:29,695 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-10-03 08:54:29,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:29,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:29,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:29,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:29,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:29,793 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:29,803 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:29,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:29,804 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:29,807 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:29,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:29,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:29,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:29,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:29,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:29,834 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:30,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:30,116 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:30,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:30,116 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:30,117 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:30,117 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:30,117 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 [2018-10-03 08:54:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:30,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:30,244 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:30,244 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:30,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:30,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:30,244 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:30,244 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:30,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-10-03 08:54:30,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:30,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:30,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:30,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:30,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:30,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:30,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:30,326 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:30,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:30,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:30,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:30,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:30,349 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:30,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:30,606 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:30,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:30,607 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:30,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:30,607 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:30,607 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:30,607 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 [2018-10-03 08:54:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-03 08:54:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:30,730 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:30,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:30,730 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:30,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:30,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:30,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:30,731 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:30,731 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:30,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-10-03 08:54:30,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:30,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:30,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:30,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:30,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:30,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:30,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:30,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:30,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:30,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:30,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:30,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:30,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:30,883 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:31,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:31,170 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:31,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:31,170 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:31,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:31,171 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:31,171 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:31,171 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 [2018-10-03 08:54:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-03 08:54:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:31,295 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:31,296 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:31,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:31,296 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:31,296 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:31,296 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:31,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-10-03 08:54:31,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:31,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:31,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:31,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:31,358 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 [2018-10-03 08:54:31,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:31,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:31,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:31,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:31,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:31,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:31,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:31,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:31,405 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:31,678 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:31,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:31,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:31,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:31,678 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:31,678 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:31,678 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 [2018-10-03 08:54:31,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-03 08:54:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:31,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:31,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:31,807 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:31,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:31,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:31,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:31,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:31,808 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:31,808 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:31,808 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:31,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-10-03 08:54:31,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:31,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:31,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:31,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:31,870 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 [2018-10-03 08:54:31,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:31,882 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:31,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:31,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:31,886 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:31,906 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:31,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:31,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:31,906 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:32,155 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:32,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:32,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:32,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:32,156 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:32,156 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:32,156 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 [2018-10-03 08:54:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:32,281 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:32,281 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:32,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:32,281 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:32,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:32,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:32,281 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:32,281 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:32,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:32,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-10-03 08:54:32,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:32,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:32,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:32,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:32,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:32,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:32,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:32,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:32,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:32,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:32,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:32,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:32,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:32,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:32,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:32,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:32,420 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:32,838 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:32,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:32,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:32,839 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:32,839 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:32,839 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 [2018-10-03 08:54:32,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:33,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-10-03 08:54:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:54:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:54:33,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-03 08:54:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:33,001 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:54:33,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:54:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:33,002 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:33,002 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:33,002 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:33,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-10-03 08:54:33,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:33,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:33,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:33,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:34,025 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 [2018-10-03 08:54:34,041 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:34,154 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:34,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:34,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:34,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:34,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:34,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:34,193 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-03 08:54:34,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:34,750 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:34,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:34,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:34,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:34,751 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:34,751 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:34,751 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 [2018-10-03 08:54:34,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:34,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:34,879 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:34,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:34,879 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:34,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:34,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:34,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:34,879 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:34,879 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:34,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-10-03 08:54:34,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:34,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:34,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:34,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:34,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:34,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:34,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:34,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:34,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:34,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:34,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:34,979 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:35,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:35,216 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:35,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:35,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:35,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:35,217 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:35,217 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:35,217 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 [2018-10-03 08:54:35,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:35,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:54:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:35,350 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:35,350 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:35,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:35,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:35,350 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:35,350 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:35,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:35,351 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-10-03 08:54:35,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:35,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:35,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:35,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:35,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:35,427 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 [2018-10-03 08:54:35,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:35,440 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:35,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:35,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,464 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:35,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:35,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:35,465 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:35,712 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:35,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:35,712 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:35,713 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:35,713 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:35,713 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 [2018-10-03 08:54:35,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-03 08:54:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:35,854 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:35,854 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:35,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:35,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:35,855 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:35,855 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:35,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:35,855 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-10-03 08:54:35,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:35,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:35,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:35,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:35,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:35,933 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 [2018-10-03 08:54:35,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:35,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:35,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:35,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:35,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:35,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:35,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:35,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:35,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:35,978 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:36,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:36,403 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:36,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:36,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:36,404 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:36,404 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:36,404 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 [2018-10-03 08:54:36,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-10-03 08:54:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:36,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:36,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:36,523 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:36,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:36,523 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:36,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:36,523 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:36,523 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:36,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-10-03 08:54:36,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:36,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:36,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:36,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:36,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:36,588 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 [2018-10-03 08:54:36,596 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:36,602 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:36,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:36,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:36,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:36,628 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:36,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:36,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:36,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:36,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:36,629 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:36,907 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:36,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:36,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:36,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:36,908 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:36,908 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:36,908 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 [2018-10-03 08:54:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:54:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:37,047 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:37,047 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:37,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:37,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:37,048 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:37,048 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:37,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:37,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-10-03 08:54:37,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:37,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:37,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:37,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:37,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:37,109 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 [2018-10-03 08:54:37,117 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:37,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:37,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:37,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:37,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:37,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:37,152 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:37,424 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:54:37,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:37,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:37,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:37,424 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:54:37,424 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:54:37,424 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 [2018-10-03 08:54:37,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:54:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:54:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:37,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:37,560 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:37,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:37,561 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:37,561 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:37,561 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:37,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:37,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-10-03 08:54:37,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:37,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:37,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:37,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:37,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:37,623 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 [2018-10-03 08:54:37,632 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:37,642 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:37,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:37,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:37,647 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:37,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:37,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:37,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:37,668 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:37,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:37,922 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:54:37,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:37,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:37,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:37,923 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:54:37,923 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:54:37,923 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 [2018-10-03 08:54:37,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:54:38,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-03 08:54:38,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:38,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:38,067 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:38,067 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:38,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:38,067 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:38,068 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:38,068 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:38,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-10-03 08:54:38,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:38,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:38,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:38,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:38,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:38,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:38,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:38,153 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:38,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:38,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:38,174 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:38,414 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:38,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:38,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:38,415 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:38,415 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:38,415 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 [2018-10-03 08:54:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:38,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-10-03 08:54:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:38,525 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-03 08:54:38,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:38,525 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:38,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:38,525 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:38,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:38,526 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:38,526 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:38,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:38,526 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-10-03 08:54:38,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:38,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:38,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:38,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:38,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:38,587 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 [2018-10-03 08:54:38,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:38,601 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:38,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:38,602 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:38,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:38,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:38,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:38,625 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-03 08:54:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:38,871 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:38,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:38,871 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:38,872 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:38,872 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:38,872 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 [2018-10-03 08:54:38,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:39,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-03 08:54:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:39,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:39,017 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:39,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:39,017 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:39,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:39,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:39,018 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:39,018 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:39,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:39,018 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-10-03 08:54:39,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:39,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:39,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:39,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:39,079 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,079 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:39,079 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 [2018-10-03 08:54:39,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:39,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:39,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:39,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:39,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:39,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:39,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:39,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:39,120 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:39,360 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:39,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:39,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:39,361 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:39,361 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:39,361 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 [2018-10-03 08:54:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:39,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-10-03 08:54:39,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:39,491 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:39,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:39,491 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:39,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:39,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:39,491 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:39,491 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:39,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-10-03 08:54:39,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:39,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:39,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:39,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:39,553 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 [2018-10-03 08:54:39,562 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:39,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:39,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:39,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:39,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:39,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:39,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:39,592 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:39,844 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:54:39,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:39,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:39,845 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:54:39,845 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:54:39,845 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 [2018-10-03 08:54:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:54:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-03 08:54:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:40,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:40,006 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:40,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:40,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:40,006 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:40,006 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:40,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-10-03 08:54:40,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:40,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:40,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:40,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:40,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:40,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:40,313 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 [2018-10-03 08:54:40,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:40,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:40,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:40,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:40,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:40,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:40,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:40,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:40,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:40,353 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:40,582 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:54:40,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:40,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:40,583 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:54:40,583 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:54:40,583 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 [2018-10-03 08:54:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:54:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-10-03 08:54:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:40,711 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:40,711 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:40,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:40,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:40,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:40,712 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:40,712 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:40,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-10-03 08:54:40,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:40,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:40,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:40,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:40,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:40,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:40,874 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 [2018-10-03 08:54:40,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:40,910 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:40,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:40,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:40,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:40,938 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:40,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:40,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:40,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:40,938 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:41,171 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:54:41,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:41,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:41,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:41,172 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:41,172 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:41,172 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 [2018-10-03 08:54:41,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-10-03 08:54:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:41,316 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:41,316 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:41,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:41,316 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:41,316 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:41,316 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:41,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:41,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-10-03 08:54:41,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:41,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:41,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:41,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:41,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:41,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:41,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:41,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:41,391 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:41,395 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:41,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:41,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:41,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:41,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:41,421 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:41,651 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:54:41,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:41,651 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:41,652 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:54:41,652 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:54:41,652 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 [2018-10-03 08:54:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:54:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-10-03 08:54:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:41,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:41,794 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:41,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:41,794 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:41,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:41,795 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:41,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:41,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:41,795 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:41,795 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:41,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-10-03 08:54:41,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:41,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:41,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:41,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:41,857 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 [2018-10-03 08:54:41,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:41,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:41,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:41,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:41,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:41,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:41,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:41,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:41,897 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:42,119 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-10-03 08:54:42,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:42,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:42,119 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:54:42,120 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:54:42,120 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 [2018-10-03 08:54:42,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:54:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-03 08:54:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:42,266 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:42,267 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:42,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:42,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:42,267 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:42,267 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:42,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:42,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-10-03 08:54:42,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:42,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:42,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:42,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:42,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:42,357 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 [2018-10-03 08:54:42,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:42,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:42,373 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:42,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:42,397 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:42,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:42,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:42,398 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:42,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:42,593 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-10-03 08:54:42,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:42,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:42,594 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:54:42,594 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:54:42,594 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 [2018-10-03 08:54:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:54:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-10-03 08:54:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:54:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:54:42,686 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-03 08:54:42,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:42,686 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:54:42,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:54:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:42,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:42,687 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:54:42,687 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:42,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-10-03 08:54:42,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:42,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:42,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:42,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:43,096 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 [2018-10-03 08:54:43,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:43,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:43,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:43,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:43,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:43,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:43,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:43,144 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-10-03 08:54:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:43,539 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:43,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:43,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:43,540 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:43,540 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:43,540 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 [2018-10-03 08:54:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-03 08:54:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:43,714 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:43,714 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:43,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:43,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:43,715 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:43,715 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:43,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-10-03 08:54:43,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:43,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:43,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:43,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:43,817 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 [2018-10-03 08:54:43,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:43,837 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:43,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:43,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:43,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:43,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:43,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:43,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:43,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:43,861 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:44,266 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:44,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:44,266 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:44,267 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:44,267 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:44,267 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 [2018-10-03 08:54:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:44,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-03 08:54:44,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:44,425 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:44,426 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:44,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:44,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:44,426 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:44,426 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:44,426 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:44,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:44,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-10-03 08:54:44,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:44,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:44,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:44,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:44,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:44,489 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 [2018-10-03 08:54:44,496 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:44,505 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:44,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:44,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:44,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:44,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:44,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:44,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:44,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:44,538 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:44,941 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:54:44,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:44,941 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:44,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:44,941 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:54:44,941 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:54:44,942 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 [2018-10-03 08:54:44,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:54:45,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-03 08:54:45,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:45,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:45,139 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:45,140 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:45,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:45,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:45,140 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:45,140 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:45,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-10-03 08:54:45,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:45,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:45,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:45,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:45,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:45,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:45,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:45,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:45,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:45,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:45,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:45,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:45,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:45,249 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:45,612 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:54:45,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:45,612 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:45,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:45,613 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:45,613 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:45,614 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 [2018-10-03 08:54:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-03 08:54:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:45,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:45,781 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:45,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:45,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:45,781 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:45,782 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:45,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-10-03 08:54:45,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:45,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:45,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:45,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:45,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:45,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:45,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:45,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:45,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:45,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:45,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:45,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:45,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:45,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:45,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:45,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:45,914 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:46,318 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:46,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:46,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:46,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:46,318 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:46,318 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:46,319 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 [2018-10-03 08:54:46,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-03 08:54:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:46,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:46,496 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:46,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:46,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:46,497 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:46,497 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:46,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:46,497 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-10-03 08:54:46,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:46,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:46,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:46,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:46,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:46,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:46,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:46,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:46,582 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:46,583 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:46,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:46,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:46,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:46,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:46,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:46,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:46,607 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:47,006 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:47,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:47,006 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:47,007 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:47,007 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:47,007 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 [2018-10-03 08:54:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:47,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-03 08:54:47,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:47,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:47,174 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:47,175 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:47,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:47,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:47,175 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:47,175 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:47,175 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:47,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:47,176 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-10-03 08:54:47,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:47,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:47,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:47,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:47,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:47,240 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 [2018-10-03 08:54:47,249 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:47,255 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:47,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:47,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:47,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:47,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:47,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:47,279 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:47,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:47,676 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:54:47,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:47,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:47,677 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:54:47,677 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:54:47,677 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 [2018-10-03 08:54:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:54:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-03 08:54:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:47,859 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:47,859 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:47,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:47,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:47,859 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:47,859 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:47,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-10-03 08:54:47,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:47,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:47,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:47,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:47,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:48,005 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 [2018-10-03 08:54:48,014 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:48,023 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:48,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:48,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:48,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:48,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:48,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:48,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:48,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:48,047 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:48,408 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:54:48,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:48,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:48,409 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:48,409 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:48,409 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 [2018-10-03 08:54:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-03 08:54:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:48,557 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:48,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:48,557 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:48,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:48,558 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:48,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:48,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:48,558 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:48,558 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:48,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-10-03 08:54:48,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:48,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:48,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:48,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:48,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:48,620 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 [2018-10-03 08:54:48,628 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:48,638 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:48,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:48,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:48,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:48,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:48,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:48,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:48,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:48,676 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:54:49,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:49,118 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:54:49,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:49,118 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:49,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:49,119 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:49,119 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:49,119 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 [2018-10-03 08:54:49,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:54:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:49,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:49,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:49,301 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:49,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:49,301 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:49,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:49,301 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:49,301 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:49,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-10-03 08:54:49,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:49,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:49,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:49,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:49,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:49,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:49,372 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:49,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:49,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:49,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:49,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:49,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:49,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:49,401 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:49,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:49,771 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:54:49,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:49,771 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:49,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:49,772 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:54:49,772 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:54:49,772 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 [2018-10-03 08:54:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:54:49,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-03 08:54:49,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:49,938 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:49,939 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:49,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:49,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:49,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:49,939 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:49,939 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:49,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:49,939 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-10-03 08:54:49,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:49,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:49,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:49,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:49,998 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:49,998 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 [2018-10-03 08:54:50,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:50,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:50,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:50,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:50,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:50,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:50,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:50,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:50,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:50,039 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:50,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:50,535 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:54:50,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:50,535 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:50,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:50,535 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:50,535 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:50,535 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 [2018-10-03 08:54:50,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:54:50,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:50,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:50,718 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:50,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:50,718 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:50,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:50,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:50,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:50,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:50,719 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:50,719 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:50,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:50,719 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-10-03 08:54:50,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:50,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:50,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:50,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:50,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:50,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:50,780 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 [2018-10-03 08:54:50,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:50,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:50,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:50,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:50,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:50,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:50,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:50,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:50,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:50,822 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:51,193 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:54:51,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:51,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:51,193 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:54:51,193 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:54:51,193 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 [2018-10-03 08:54:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:54:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-03 08:54:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:51,360 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:51,360 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:51,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:51,360 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:51,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:51,361 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:51,361 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:51,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-10-03 08:54:51,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:51,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:51,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:51,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:51,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:51,427 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:51,427 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 [2018-10-03 08:54:51,434 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:51,440 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:51,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:51,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:51,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:51,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:51,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:51,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:51,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:51,476 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:51,967 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:51,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:51,967 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:51,968 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:51,968 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:51,968 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 [2018-10-03 08:54:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-03 08:54:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:52,146 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:52,146 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:52,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:52,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:52,147 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:52,147 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:52,147 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:52,147 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:52,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-10-03 08:54:52,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:52,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:52,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:52,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:52,211 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 [2018-10-03 08:54:52,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:52,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:52,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:52,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:52,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:52,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:52,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:52,253 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:52,597 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:54:52,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:52,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:52,598 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:54:52,598 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:54:52,598 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 [2018-10-03 08:54:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:54:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:54:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:52,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:52,778 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:52,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:52,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:52,778 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:52,779 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:52,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-10-03 08:54:52,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:52,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:52,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:52,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:52,925 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 [2018-10-03 08:54:52,932 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:52,941 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:52,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:52,942 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:52,945 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:52,965 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:52,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:52,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:52,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:52,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:52,966 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:53,304 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:54:53,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:53,304 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:53,305 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:54:53,305 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:54:53,305 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 [2018-10-03 08:54:53,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:54:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:54:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:53,483 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:53,483 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:53,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:53,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:53,483 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:53,483 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:53,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-10-03 08:54:53,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:53,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:53,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:53,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:53,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:53,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:53,578 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 [2018-10-03 08:54:53,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:53,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:53,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:53,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:53,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:53,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:53,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:53,616 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:53,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:53,930 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:54:53,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:53,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:53,931 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:54:53,931 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:54:53,931 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 [2018-10-03 08:54:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:54:54,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-10-03 08:54:54,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:54:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:54:54,059 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-03 08:54:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:54,060 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:54:54,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:54:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:54,060 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:54,060 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:54,060 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:54,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:54,060 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-10-03 08:54:54,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:54,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:54,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:54,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:54,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:54,123 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 [2018-10-03 08:54:54,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:54,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:54,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:54,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:54,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:54,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:54,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:54,162 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-03 08:54:54,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:54,575 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:54,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:54,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:54,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:54,576 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:54,576 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:54,576 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 [2018-10-03 08:54:54,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-03 08:54:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:54,771 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:54,771 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:54,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:54,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:54,771 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:54,771 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:54,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:54,772 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-10-03 08:54:54,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:54,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:54,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:54,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:54,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,839 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:54,839 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 [2018-10-03 08:54:54,846 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:54,856 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:54,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:54,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:54,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:54,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:54,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:54,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:54,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:54,882 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:55,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:55,309 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:55,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:55,309 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:55,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:55,310 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:55,310 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:55,310 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 [2018-10-03 08:54:55,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:55,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-03 08:54:55,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:55,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:55,508 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:55,508 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:55,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:55,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:55,509 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:55,509 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:55,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-10-03 08:54:55,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:55,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:55,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:55,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:55,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:55,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:55,587 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 [2018-10-03 08:54:55,595 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:55,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:55,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:55,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:55,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:55,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:55,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:55,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:55,625 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:56,035 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:54:56,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:56,035 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:56,035 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:54:56,036 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:54:56,036 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 [2018-10-03 08:54:56,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:54:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-03 08:54:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:56,232 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:56,232 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:56,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:56,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:56,232 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:56,233 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:56,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:56,233 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-10-03 08:54:56,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:56,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:56,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:56,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:56,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:56,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:56,324 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 [2018-10-03 08:54:56,331 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:54:56,339 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:54:56,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:56,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:56,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:56,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:56,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:56,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:56,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:56,364 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:56,758 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:54:56,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:56,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:56,759 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:56,759 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:56,759 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 [2018-10-03 08:54:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:56,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-10-03 08:54:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:54:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:54:56,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:54:56,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:56,924 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:54:56,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:56,924 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:54:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:56,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:56,924 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:56,925 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:56,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:56,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-10-03 08:54:56,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:56,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:56,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:56,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:56,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:56,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:56,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:56,995 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:54:57,004 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:54:57,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:57,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:57,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:57,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:57,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:57,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:57,029 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:54:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:57,472 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:57,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:57,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:57,473 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:57,473 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:57,473 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 [2018-10-03 08:54:57,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:57,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-10-03 08:54:57,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:57,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:57,655 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:57,656 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:57,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:57,656 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:57,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:57,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:57,656 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:57,656 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:57,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:57,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-10-03 08:54:57,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:57,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:57,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:57,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:57,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:57,716 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:57,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:57,717 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:57,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:57,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:57,735 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:57,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:57,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:57,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:57,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:57,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:57,756 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:58,199 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:54:58,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:58,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:58,200 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:54:58,200 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:54:58,200 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 [2018-10-03 08:54:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:54:58,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-10-03 08:54:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:54:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:54:58,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:54:58,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:58,389 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:54:58,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:54:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:58,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:58,390 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:58,390 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:58,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:58,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-10-03 08:54:58,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:58,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:58,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:58,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:54:58,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:58,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:58,450 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 [2018-10-03 08:54:58,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:54:58,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:54:58,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:58,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:58,466 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:58,486 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:58,486 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:58,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:58,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:58,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:58,487 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:54:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:58,912 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:54:58,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:58,912 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:58,913 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:54:58,913 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:54:58,913 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 [2018-10-03 08:54:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:54:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-10-03 08:54:59,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:54:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:54:59,101 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:54:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:59,101 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:54:59,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:54:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:59,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:59,102 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:54:59,102 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:59,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-10-03 08:54:59,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:59,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:59,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:59,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:59,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:59,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:54:59,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:54:59,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:54:59,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:59,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:59,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:59,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:59,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:59,206 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:54:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:54:59,624 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:54:59,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:54:59,624 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:54:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:54:59,625 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:54:59,625 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:54:59,625 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 [2018-10-03 08:54:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:54:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-10-03 08:54:59,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:54:59,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:54:59,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:54:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:54:59,789 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:54:59,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:54:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:54:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:54:59,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:54:59,789 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:54:59,789 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:54:59,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:54:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-10-03 08:54:59,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:54:59,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:54:59,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:54:59,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:54:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:54:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:59,852 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:54:59,852 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 [2018-10-03 08:54:59,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:54:59,867 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:54:59,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:54:59,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:54:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:54:59,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:54:59,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:54:59,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:54:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:54:59,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:54:59,893 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:55:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:00,305 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:55:00,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:00,305 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:00,306 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:55:00,306 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:55:00,306 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 [2018-10-03 08:55:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:55:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:55:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:00,495 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:00,496 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:00,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:00,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:00,496 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:00,496 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:00,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:00,496 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-10-03 08:55:00,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:00,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:00,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:00,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:00,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:00,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:00,558 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 [2018-10-03 08:55:00,565 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:00,573 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:55:00,574 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:00,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:00,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:00,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:00,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:00,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:00,599 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:00,995 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:00,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:00,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:00,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:00,995 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:00,995 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:00,996 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 [2018-10-03 08:55:00,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:01,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-03 08:55:01,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:01,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:01,184 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:01,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:01,184 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:01,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:01,184 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:01,184 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:01,184 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:01,184 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:01,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-10-03 08:55:01,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:01,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:01,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:01,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:01,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:01,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:01,483 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 [2018-10-03 08:55:01,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:01,501 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:55:01,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:01,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:01,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:01,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:01,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:01,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:01,525 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:01,922 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:55:01,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:01,922 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:01,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:01,923 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:55:01,923 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:55:01,923 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 [2018-10-03 08:55:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:55:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:55:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:02,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:02,122 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:02,122 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:02,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:02,122 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:02,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:02,123 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:02,123 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:02,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-10-03 08:55:02,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:02,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:02,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:02,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:02,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:02,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:02,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:02,192 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:02,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:02,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:02,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:02,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:02,226 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:02,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:02,626 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:02,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:02,626 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:02,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:02,627 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:02,627 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:02,627 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 [2018-10-03 08:55:02,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-10-03 08:55:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:55:02,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:55:02,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:55:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:02,821 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:55:02,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:55:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:02,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:02,822 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:02,822 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:02,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:02,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-10-03 08:55:02,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:02,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:02,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:02,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:02,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:02,900 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:02,900 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:02,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:02,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:02,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:02,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:02,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:02,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:02,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:02,938 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:55:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:03,312 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:55:03,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:03,312 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:03,312 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:55:03,312 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:55:03,312 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 [2018-10-03 08:55:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:55:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-03 08:55:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:03,497 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:03,497 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:03,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:03,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:03,497 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:03,497 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:03,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-10-03 08:55:03,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:03,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:03,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:03,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:03,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:03,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:03,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:03,599 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:55:03,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:03,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:03,623 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:03,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:03,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:03,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:03,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:03,624 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:03,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:03,995 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:55:03,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:03,995 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:03,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:03,995 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:55:03,996 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:55:03,996 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 [2018-10-03 08:55:03,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:55:04,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:55:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:04,178 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:04,178 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:04,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:04,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:04,179 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:04,179 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:04,179 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:04,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-10-03 08:55:04,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:04,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:04,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:04,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:04,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:04,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:04,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:04,250 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:04,256 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:04,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:04,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:04,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:04,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:04,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:04,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:04,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:04,291 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:04,655 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:55:04,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:04,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:04,656 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:55:04,656 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:55:04,656 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 [2018-10-03 08:55:04,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:55:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:55:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:04,856 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:04,856 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:04,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:04,857 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:04,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:04,857 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:55:04,857 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:04,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:04,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-10-03 08:55:04,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:04,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:04,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:04,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:04,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:04,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:04,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:04,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:04,957 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:55:04,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:04,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:04,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:04,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:04,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:04,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:04,980 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:05,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:05,316 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:55:05,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:05,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:05,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:05,317 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:55:05,317 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:55:05,317 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 [2018-10-03 08:55:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:55:05,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-10-03 08:55:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:55:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:55:05,448 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-10-03 08:55:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:05,448 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:55:05,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:55:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:05,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:05,449 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:05,449 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:05,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-10-03 08:55:05,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:05,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:05,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:05,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:05,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:05,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:05,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:05,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:05,528 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:55:05,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:05,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:05,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:05,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:05,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:05,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:05,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:05,552 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-10-03 08:55:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:05,963 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:05,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:05,963 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:05,964 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:05,964 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:05,964 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 [2018-10-03 08:55:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:55:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:06,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:06,192 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:06,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:06,192 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:06,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:06,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:06,193 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:06,193 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:06,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:06,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-10-03 08:55:06,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:06,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:06,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:06,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:06,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:06,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:06,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:06,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:06,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:06,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:06,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:06,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:06,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:06,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:06,369 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:06,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:06,750 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:55:06,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:06,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:06,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:06,751 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:55:06,751 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:55:06,751 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 [2018-10-03 08:55:06,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:55:06,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:55:06,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:06,957 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:06,957 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:06,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:06,957 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:06,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:06,957 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:06,957 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:06,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:06,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-10-03 08:55:06,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:06,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:06,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:06,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:06,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:07,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:07,019 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 [2018-10-03 08:55:07,026 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:07,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:07,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:07,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:07,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:07,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:07,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:07,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:07,057 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:07,490 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:07,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:07,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:07,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:07,491 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:07,491 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:07,491 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 [2018-10-03 08:55:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:55:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:07,691 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:07,691 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:07,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:07,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:07,691 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:07,691 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:07,692 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:07,692 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-10-03 08:55:07,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:07,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:07,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:07,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:07,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:07,760 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:07,760 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:07,760 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 [2018-10-03 08:55:07,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:07,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:55:07,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:07,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:07,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:07,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:07,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:07,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:07,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:07,805 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:08,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:08,210 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:55:08,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:08,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:08,212 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:55:08,212 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:55:08,212 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 [2018-10-03 08:55:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:55:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-03 08:55:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:55:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:55:08,416 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:55:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:08,417 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:55:08,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:55:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:08,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:08,417 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:08,417 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:08,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:08,417 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-10-03 08:55:08,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:08,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:08,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:08,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:08,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:08,479 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 [2018-10-03 08:55:08,488 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:08,493 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:08,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:08,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:08,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:08,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:08,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:08,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:08,528 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:55:09,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:09,019 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:55:09,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:09,019 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:09,020 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:55:09,020 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:55:09,020 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 [2018-10-03 08:55:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:55:09,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:55:09,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:09,250 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:09,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:09,250 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:09,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:09,250 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:09,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:09,250 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:09,251 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:09,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:09,251 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-10-03 08:55:09,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:09,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:09,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:09,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:09,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:09,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:09,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:09,311 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 [2018-10-03 08:55:09,318 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:09,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:55:09,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:09,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:09,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:09,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:09,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:09,352 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:09,738 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:55:09,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:09,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:09,739 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:55:09,739 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:55:09,739 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 [2018-10-03 08:55:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:55:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-03 08:55:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:09,951 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:09,951 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:09,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:09,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:09,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:09,952 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:09,952 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:09,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:09,952 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-10-03 08:55:09,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:09,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:09,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:09,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:09,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:10,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:10,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:10,023 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:10,031 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:55:10,032 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:10,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:10,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:10,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:10,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:10,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:10,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:10,056 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:10,434 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:55:10,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:10,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:10,434 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:55:10,434 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:55:10,434 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 [2018-10-03 08:55:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:55:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-03 08:55:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:10,637 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:10,637 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:10,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:10,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:10,638 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:10,638 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:10,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-10-03 08:55:10,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:10,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:10,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:10,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:10,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:10,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:10,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:10,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:10,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:10,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:10,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:10,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:10,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:10,744 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:11,116 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:55:11,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:11,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:11,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:11,117 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:55:11,117 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:55:11,117 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 [2018-10-03 08:55:11,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:55:11,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-10-03 08:55:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:55:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:55:11,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:55:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:11,297 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:55:11,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:55:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:11,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:11,297 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:11,298 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:11,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:11,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-10-03 08:55:11,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:11,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:11,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:11,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:11,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:11,363 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:11,363 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 [2018-10-03 08:55:11,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:11,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:11,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:11,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:11,404 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:11,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:11,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:11,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:11,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:11,404 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:55:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:11,854 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:11,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:11,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:11,855 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:11,855 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:11,855 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 [2018-10-03 08:55:11,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:12,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:55:12,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:12,102 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:12,102 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:12,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:12,102 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:12,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:12,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:12,103 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:12,103 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:12,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-10-03 08:55:12,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:12,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:12,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:12,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:12,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:12,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:12,187 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 [2018-10-03 08:55:12,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:12,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:55:12,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:12,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:12,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:12,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:12,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:12,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:12,239 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:13,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:13,271 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:55:13,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:13,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:13,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:13,271 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:55:13,271 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:55:13,272 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 [2018-10-03 08:55:13,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:55:13,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-10-03 08:55:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:13,607 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:13,607 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:13,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:13,608 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:13,608 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:13,608 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:13,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:13,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-10-03 08:55:13,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:13,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:13,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:13,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:13,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:13,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:13,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:13,693 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:13,698 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:13,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:13,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:13,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:13,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:13,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:13,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:13,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:13,722 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:14,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:14,149 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:14,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:14,149 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:14,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:14,150 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:14,150 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:14,150 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 [2018-10-03 08:55:14,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:55:14,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:14,384 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:14,384 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:14,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:14,384 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:14,385 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:14,385 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:14,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:14,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-10-03 08:55:14,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:14,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:14,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:14,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:14,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:14,450 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 [2018-10-03 08:55:14,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:14,467 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:55:14,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:14,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:14,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:14,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:14,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:14,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:14,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:14,491 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:14,905 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:55:14,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:14,905 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:14,905 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:55:14,905 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:55:14,906 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 [2018-10-03 08:55:14,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:55:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-10-03 08:55:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:55:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:55:15,120 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:55:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:15,120 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:55:15,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:55:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:15,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:15,120 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:15,121 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:15,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-10-03 08:55:15,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:15,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:15,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:15,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:15,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:16,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:16,097 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 [2018-10-03 08:55:16,104 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:16,112 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:55:16,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:16,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:16,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:16,142 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:16,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:16,142 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:55:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:16,534 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:55:16,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:16,534 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:16,534 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:55:16,534 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:55:16,534 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 [2018-10-03 08:55:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:55:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:55:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:16,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:16,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:16,757 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:16,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:16,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:16,758 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:16,758 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:16,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:16,758 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-10-03 08:55:16,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:16,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:16,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:16,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:16,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:16,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:16,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:16,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:16,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:16,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:16,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:16,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:16,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:16,928 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:17,334 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:55:17,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:17,334 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:17,335 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:55:17,335 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:55:17,335 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 [2018-10-03 08:55:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:55:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-10-03 08:55:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:17,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:17,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:17,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:17,546 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:17,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:17,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:17,546 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:17,546 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:17,546 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:17,547 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-10-03 08:55:17,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:17,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:17,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:17,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:17,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:17,609 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:17,609 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 [2018-10-03 08:55:17,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:17,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:17,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:17,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:17,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:17,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:17,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:17,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:17,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:17,648 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:18,027 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:55:18,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:18,027 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:18,028 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:55:18,028 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:55:18,028 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 [2018-10-03 08:55:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:55:18,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-03 08:55:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:18,246 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:18,246 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:18,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:18,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:18,247 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:55:18,247 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:18,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-10-03 08:55:18,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:18,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:18,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:18,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:18,312 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 [2018-10-03 08:55:18,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:18,330 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:55:18,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:18,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:18,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:18,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:18,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:18,354 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:18,718 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:55:18,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:18,718 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:18,719 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:55:18,719 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:55:18,719 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 [2018-10-03 08:55:18,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:55:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-10-03 08:55:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:55:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:55:18,880 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-10-03 08:55:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:18,880 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:55:18,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:55:18,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:18,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:18,881 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:18,881 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:18,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-10-03 08:55:18,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:18,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:18,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:18,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:18,944 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 [2018-10-03 08:55:18,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:18,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:18,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:18,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:18,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:18,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:18,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:18,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:18,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:18,981 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-10-03 08:55:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:19,362 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:55:19,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:19,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:19,363 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:55:19,363 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:55:19,363 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 [2018-10-03 08:55:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:55:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-03 08:55:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:19,580 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:19,580 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:19,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:19,580 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:19,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:19,581 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:19,581 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:19,581 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-10-03 08:55:19,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:19,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:19,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:19,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:19,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:19,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:19,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:19,652 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:19,661 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:55:19,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:19,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:19,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:19,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:19,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:19,696 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:20,111 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:55:20,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:20,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:20,112 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:55:20,112 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:55:20,112 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 [2018-10-03 08:55:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:55:20,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-03 08:55:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:20,332 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:20,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:20,332 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:20,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:20,332 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:20,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:20,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:20,332 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:20,333 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:20,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:20,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-10-03 08:55:20,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:20,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:20,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:20,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:20,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:20,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:20,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:20,402 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:20,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:55:20,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:20,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:20,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:20,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:20,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:20,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:20,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:20,435 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:20,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:20,808 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:55:20,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:20,808 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:20,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:20,809 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:55:20,809 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:55:20,809 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 [2018-10-03 08:55:20,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:55:21,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-03 08:55:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:21,042 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:21,042 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:21,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:21,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:21,043 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:21,043 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:21,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:21,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-10-03 08:55:21,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:21,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:21,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:21,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:21,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:21,104 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 [2018-10-03 08:55:21,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:21,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:21,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:21,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:21,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:21,139 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:21,538 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:55:21,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:21,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:21,538 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:55:21,538 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:55:21,539 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 [2018-10-03 08:55:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:55:21,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-10-03 08:55:21,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:55:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:55:21,753 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:55:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:21,753 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:55:21,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:21,754 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:55:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:21,754 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:21,754 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:21,754 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:21,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:21,754 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-10-03 08:55:21,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:21,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:21,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:21,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:21,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:21,835 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 [2018-10-03 08:55:21,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:21,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:21,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:21,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:21,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:21,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:21,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:21,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:21,874 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:55:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:22,252 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:55:22,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:22,252 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:22,252 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:55:22,252 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:55:22,252 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 [2018-10-03 08:55:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:55:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-10-03 08:55:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:22,486 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:22,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:22,486 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:22,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:22,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:22,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:22,487 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:22,487 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:22,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:22,487 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-10-03 08:55:22,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:22,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:22,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:22,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:22,548 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 [2018-10-03 08:55:22,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:22,580 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:55:22,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:22,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:22,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:22,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:22,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:22,614 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:23,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:23,087 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:55:23,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:23,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:23,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:23,088 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:55:23,088 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:55:23,088 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 [2018-10-03 08:55:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:55:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-10-03 08:55:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:23,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:23,313 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:23,313 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:23,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:23,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:23,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:23,313 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:23,313 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:23,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:23,313 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-10-03 08:55:23,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:23,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:23,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:23,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:23,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:23,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:23,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:23,375 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 [2018-10-03 08:55:23,386 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:23,391 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:23,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:23,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:23,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:23,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:23,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:23,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:23,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:23,414 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:23,790 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:55:23,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:23,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:23,791 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:55:23,791 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:55:23,791 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 [2018-10-03 08:55:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:55:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-10-03 08:55:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:24,011 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:24,012 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:24,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:24,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:24,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:24,012 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:55:24,012 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:24,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:24,012 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-10-03 08:55:24,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:24,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:24,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:24,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:24,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:24,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:24,096 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 [2018-10-03 08:55:24,104 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:24,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:55:24,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:24,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:24,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:24,139 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:24,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:24,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:24,140 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:24,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:24,491 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:55:24,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:24,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:24,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:24,492 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:55:24,492 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:55:24,492 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 [2018-10-03 08:55:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:55:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-10-03 08:55:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:55:24,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:55:24,670 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-10-03 08:55:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:24,670 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:55:24,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:55:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:24,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:24,670 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-10-03 08:55:24,670 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:24,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-10-03 08:55:24,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:24,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:24,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:24,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:24,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:24,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:24,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:24,741 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:24,749 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:55:24,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:24,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:24,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:24,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:24,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:24,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:24,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:24,772 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-10-03 08:55:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:25,125 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:55:25,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:25,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:25,125 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:55:25,126 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:55:25,126 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 [2018-10-03 08:55:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:55:25,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-03 08:55:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:25,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:25,360 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:25,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:25,361 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:25,361 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:25,361 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:25,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:25,361 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-10-03 08:55:25,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:25,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:25,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:25,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:25,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:25,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:25,424 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 [2018-10-03 08:55:25,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:25,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:25,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:25,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:25,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:25,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:25,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:25,463 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:25,798 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:55:25,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:25,798 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:25,799 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:55:25,799 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:55:25,799 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 [2018-10-03 08:55:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:55:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-10-03 08:55:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:26,033 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:26,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:26,034 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:26,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:26,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:26,034 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:26,034 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:26,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-10-03 08:55:26,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:26,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:26,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:26,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:26,123 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:26,123 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 [2018-10-03 08:55:26,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:26,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:26,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:26,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:26,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:26,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:26,162 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:26,528 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:55:26,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:26,528 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:26,529 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:55:26,529 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:55:26,529 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 [2018-10-03 08:55:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:55:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-03 08:55:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:26,762 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:26,762 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:26,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:26,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:26,763 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:55:26,763 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:26,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:26,763 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-10-03 08:55:26,763 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:26,763 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:26,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:26,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:26,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:26,835 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 [2018-10-03 08:55:26,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:26,853 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-03 08:55:26,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:26,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:26,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:26,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:26,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:26,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:26,877 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:27,191 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:55:27,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:27,191 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:27,191 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:55:27,191 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:55:27,191 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 [2018-10-03 08:55:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:55:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-03 08:55:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:55:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:55:27,413 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-10-03 08:55:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:27,413 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:55:27,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:55:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:27,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:27,414 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-10-03 08:55:27,414 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:27,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-10-03 08:55:27,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:27,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:27,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:27,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:27,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:27,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:27,478 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 [2018-10-03 08:55:27,486 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:27,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:27,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:27,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:27,516 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:27,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:27,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:27,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:27,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:27,517 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-10-03 08:55:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:27,836 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:55:27,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:27,836 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:27,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:27,836 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:55:27,836 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:55:27,837 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 [2018-10-03 08:55:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:55:28,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-10-03 08:55:28,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:28,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:28,083 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:28,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:28,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:28,083 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:55:28,083 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:28,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-10-03 08:55:28,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:28,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:28,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:28,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:28,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:28,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:28,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:28,158 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:28,166 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-03 08:55:28,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:28,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:28,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:28,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:28,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:28,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:28,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:28,191 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:28,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:28,526 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:55:28,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:28,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:28,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:28,527 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:55:28,527 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:55:28,527 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 [2018-10-03 08:55:28,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:55:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-10-03 08:55:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:28,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-10-03 08:55:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:28,765 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:28,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:28,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:28,765 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-10-03 08:55:28,765 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:28,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-10-03 08:55:28,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:28,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:28,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:28,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:28,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:28,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:28,825 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 [2018-10-03 08:55:28,832 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:28,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 08:55:28,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:28,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:28,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:28,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:28,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:28,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:28,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:28,863 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-10-03 08:55:29,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:29,176 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-10-03 08:55:29,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:29,176 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:29,177 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:55:29,177 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:55:29,177 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 [2018-10-03 08:55:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:55:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-10-03 08:55:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:29,415 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-10-03 08:55:29,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:29,415 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:29,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:29,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:55:29,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:29,416 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-10-03 08:55:29,416 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:29,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-10-03 08:55:29,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:29,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:29,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:29,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:29,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:29,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:29,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:29,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:29,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:29,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:29,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:55:29,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:55:29,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:55:29,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:55:29,616 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-10-03 08:55:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:29,889 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-10-03 08:55:29,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:55:29,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-03 08:55:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:29,890 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:55:29,890 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:55:29,890 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 [2018-10-03 08:55:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:55:30,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-10-03 08:55:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:55:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-10-03 08:55:30,032 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-10-03 08:55:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:30,032 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-10-03 08:55:30,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:55:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-10-03 08:55:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:30,033 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:30,033 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-10-03 08:55:30,033 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:30,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:30,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-10-03 08:55:30,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:30,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:30,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:30,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:30,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:30,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:30,114 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 [2018-10-03 08:55:30,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:30,132 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:30,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:30,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:30,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:30,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:30,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:30,167 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-10-03 08:55:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:30,767 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:30,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:30,768 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:30,768 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:30,769 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:30,769 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 [2018-10-03 08:55:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:55:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:31,064 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:31,065 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:31,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:31,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:31,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:31,065 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-03 08:55:31,066 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:31,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-10-03 08:55:31,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:31,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:31,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:31,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:31,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:31,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:31,144 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 [2018-10-03 08:55:31,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:31,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:31,186 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:31,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:31,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:31,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:31,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:31,187 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:31,778 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:31,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:31,778 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:31,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:31,779 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:31,779 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:31,779 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 [2018-10-03 08:55:31,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:55:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:32,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:55:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:32,075 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:32,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:32,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:32,075 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:32,075 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-03 08:55:32,075 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:32,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:32,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-10-03 08:55:32,076 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:32,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:32,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:32,076 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:32,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:32,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:32,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:32,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:32,270 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:32,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:32,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:32,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:32,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:32,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:32,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:32,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:32,295 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:55:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:32,890 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:55:32,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:32,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:32,891 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:55:32,891 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:55:32,891 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 [2018-10-03 08:55:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:55:33,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:55:33,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:33,169 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:33,169 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:33,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:33,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:33,170 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:33,170 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:33,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:33,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-10-03 08:55:33,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:33,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:33,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:33,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:33,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:33,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:33,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:33,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:55:33,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:33,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:33,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:33,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:33,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:33,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:33,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:33,285 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:33,848 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:33,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:33,848 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:33,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:33,848 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:33,848 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:33,849 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 [2018-10-03 08:55:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:34,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-03 08:55:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:34,116 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:55:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:34,116 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:34,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:34,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:34,116 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-03 08:55:34,116 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:34,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-10-03 08:55:34,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:34,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:34,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:34,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:34,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:34,186 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:34,186 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 [2018-10-03 08:55:34,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:34,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:34,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:34,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:34,224 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:34,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:34,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:34,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:34,225 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:55:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:34,818 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:34,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:34,818 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:34,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:34,818 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:34,818 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:34,819 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 [2018-10-03 08:55:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:55:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:35,115 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:35,115 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:35,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:35,115 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:35,115 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:35,116 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:35,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-10-03 08:55:35,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:35,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:35,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:35,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:35,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:35,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:35,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:35,191 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:35,201 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:55:35,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:35,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:35,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:35,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:35,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:35,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:35,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:35,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:35,226 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:35,833 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:35,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:35,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:35,834 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:35,834 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:35,834 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 [2018-10-03 08:55:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:55:36,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:36,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:55:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:36,118 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:36,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:36,118 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:36,118 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:36,118 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:36,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-10-03 08:55:36,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:36,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:36,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:36,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:36,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:36,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:36,192 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 [2018-10-03 08:55:36,200 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:36,209 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:55:36,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:36,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:36,233 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:36,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:36,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:36,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:36,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:36,234 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:55:36,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:36,812 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:55:36,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:36,812 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:36,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:36,813 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:55:36,813 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:55:36,813 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 [2018-10-03 08:55:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:55:37,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:55:37,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:37,120 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:37,120 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:37,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:37,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:37,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:37,121 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:37,121 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:37,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-10-03 08:55:37,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:37,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:37,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:37,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:37,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:37,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:37,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:37,255 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:37,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:37,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:37,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:37,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:37,285 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:37,847 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:37,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:37,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:37,848 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:37,848 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:37,848 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 [2018-10-03 08:55:37,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-03 08:55:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:55:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:55:38,105 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:55:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:38,105 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:55:38,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:55:38,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:38,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:38,106 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-03 08:55:38,106 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:38,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-10-03 08:55:38,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:38,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:38,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:38,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:38,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:38,179 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:38,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:38,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:38,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:38,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:38,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:38,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:38,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:38,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:38,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:38,220 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:55:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:38,782 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:38,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:38,782 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:38,782 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:38,782 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 [2018-10-03 08:55:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:39,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:55:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:39,080 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:39,081 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:39,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:39,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:39,081 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:39,081 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:39,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-10-03 08:55:39,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:39,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:39,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:39,082 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:39,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:39,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:39,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:39,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:39,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:39,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:55:39,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:39,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:39,206 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:39,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:39,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:39,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:39,207 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:39,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:39,770 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:55:39,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:39,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:39,771 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:55:39,771 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:55:39,771 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 [2018-10-03 08:55:39,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:55:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:55:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:40,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:55:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:40,053 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:40,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:40,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:40,053 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:40,054 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:40,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:40,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-10-03 08:55:40,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:40,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:40,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:40,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:40,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:40,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:40,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:40,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:40,135 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:40,142 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:40,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:40,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:40,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:40,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:40,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:40,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:40,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:40,165 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:55:40,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:40,758 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:40,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:40,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:40,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:40,759 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:40,759 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:40,759 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 [2018-10-03 08:55:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:55:41,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:41,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:41,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:41,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:41,038 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:41,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:41,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:41,039 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:41,039 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:41,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:41,039 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-10-03 08:55:41,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:41,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:41,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:41,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:41,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:41,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:41,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:41,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:41,133 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:41,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:55:41,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:41,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:41,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:41,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:41,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:41,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:41,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:41,171 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:41,735 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:55:41,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:41,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:41,735 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:55:41,735 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:55:41,735 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 [2018-10-03 08:55:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:55:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-03 08:55:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:41,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:55:41,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:41,993 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:41,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:41,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:41,993 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:41,994 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:41,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:41,994 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-10-03 08:55:41,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:41,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:41,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:41,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:41,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:42,061 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:42,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:42,071 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:42,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:55:42,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:42,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:42,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:42,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:42,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:42,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:42,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:42,114 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:55:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:42,616 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:42,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:42,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:42,617 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:42,617 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:42,617 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 [2018-10-03 08:55:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:42,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-03 08:55:42,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:42,920 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:42,920 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:42,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:42,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:42,920 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:42,920 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:42,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:42,920 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-10-03 08:55:42,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:42,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:42,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:42,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:42,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:42,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:42,989 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 [2018-10-03 08:55:42,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:43,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:43,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:43,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:43,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:43,030 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:43,568 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:43,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:43,568 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:43,569 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:43,569 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:43,569 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 [2018-10-03 08:55:43,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:55:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:43,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:55:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:43,842 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:43,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:43,842 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:43,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:43,842 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:43,842 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:43,843 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:43,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:43,843 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-10-03 08:55:43,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:43,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:43,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:43,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:43,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:43,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:43,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:43,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:43,946 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:43,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:43,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:43,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:43,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:43,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:43,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:43,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:43,970 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:55:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:44,474 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:55:44,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:44,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:44,475 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:55:44,475 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:55:44,475 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 [2018-10-03 08:55:44,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:55:44,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:55:44,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:44,758 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:44,758 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:44,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:44,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:44,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:44,759 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:55:44,759 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:44,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:44,759 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-10-03 08:55:44,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:44,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:44,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:44,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:44,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:44,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:44,828 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 [2018-10-03 08:55:44,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:44,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:55:44,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:44,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:44,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:44,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:44,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:44,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:44,872 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:45,355 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:55:45,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:45,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:45,356 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:55:45,356 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:55:45,356 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 [2018-10-03 08:55:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:55:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-03 08:55:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:55:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:55:45,658 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-03 08:55:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:45,658 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:55:45,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:55:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:45,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:45,658 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-03 08:55:45,658 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:45,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:45,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-10-03 08:55:45,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:45,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:45,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:45,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:45,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:45,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:45,732 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 [2018-10-03 08:55:45,741 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:45,748 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:45,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:45,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:45,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:45,773 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:45,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:45,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:45,773 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-03 08:55:46,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:46,405 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:46,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:46,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:46,406 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:46,406 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:46,406 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 [2018-10-03 08:55:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:55:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:46,713 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:46,713 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:46,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:46,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:46,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:46,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:46,714 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:46,714 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:46,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-10-03 08:55:46,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:46,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:46,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:46,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:46,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:46,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:46,781 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 [2018-10-03 08:55:46,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:46,801 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:55:46,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:46,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:46,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:46,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:46,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:46,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:46,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:46,825 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:47,457 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:47,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:47,457 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:47,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:47,457 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:47,458 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:47,458 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 [2018-10-03 08:55:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:55:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:47,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:55:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:47,740 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:47,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:47,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:47,741 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:47,741 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:47,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:47,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-10-03 08:55:47,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:47,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:47,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:47,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:47,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:47,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:47,812 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 [2018-10-03 08:55:47,820 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:47,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:55:47,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:47,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:47,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:47,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:47,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:47,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:47,855 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:55:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:48,473 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:55:48,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:48,473 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:48,473 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:55:48,473 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:55:48,473 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 [2018-10-03 08:55:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:55:48,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:55:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:48,761 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:48,761 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:48,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:48,761 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:48,762 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:48,762 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:48,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-10-03 08:55:48,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:48,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:48,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:48,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:48,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:48,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:48,841 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 [2018-10-03 08:55:48,850 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:48,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:48,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:48,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:48,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:48,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:48,879 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:49,472 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:49,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:49,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:49,473 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:49,473 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:49,473 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 [2018-10-03 08:55:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-03 08:55:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:49,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:55:49,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:49,765 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:49,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:49,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:49,766 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:49,766 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:49,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:49,766 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-10-03 08:55:49,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:49,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:49,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:49,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:49,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:49,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:49,835 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 [2018-10-03 08:55:49,843 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:49,850 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:49,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:49,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:49,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:49,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:49,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:49,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:49,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:49,874 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:55:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:50,516 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:50,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:50,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:50,517 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:50,517 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:50,517 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 [2018-10-03 08:55:50,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:50,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:55:50,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:50,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:50,839 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:50,839 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:50,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:50,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:50,839 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:50,839 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:50,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:50,840 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-10-03 08:55:50,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:50,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:50,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:50,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:50,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:50,927 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 [2018-10-03 08:55:50,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:50,945 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:55:50,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:50,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:50,970 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:50,970 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:50,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:50,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:50,971 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:51,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:51,616 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:55:51,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:51,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:51,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:51,617 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:55:51,617 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:55:51,617 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 [2018-10-03 08:55:51,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:55:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:55:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:51,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:51,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:55:51,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:51,931 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:51,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:51,931 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:51,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:51,931 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:51,931 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:51,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-10-03 08:55:51,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:51,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:51,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:51,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:51,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:52,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:52,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:52,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:52,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:52,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:52,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:52,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:52,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:52,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:52,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:52,042 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:55:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:52,665 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:55:52,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:52,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:52,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:52,665 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:55:52,666 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:55:52,666 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 [2018-10-03 08:55:52,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:55:52,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:55:52,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:52,984 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:52,984 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:52,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:52,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:52,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:52,985 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:55:52,985 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:52,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:52,985 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-10-03 08:55:52,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:52,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:52,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:52,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:52,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:53,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:53,072 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 [2018-10-03 08:55:53,079 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:53,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:55:53,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:53,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:53,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:53,117 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:53,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:53,117 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:53,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:53,719 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:53,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:53,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:53,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:53,720 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:53,720 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:53,720 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 [2018-10-03 08:55:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:53,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-03 08:55:53,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:55:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:55:53,988 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:55:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:53,988 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:55:53,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:55:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:53,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:53,989 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:55:53,989 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:53,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:53,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-10-03 08:55:53,989 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:53,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:53,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:53,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:53,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:54,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:54,060 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 [2018-10-03 08:55:54,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:55:54,078 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:55:54,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:54,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:54,102 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:54,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:54,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:54,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:54,103 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:55:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:54,702 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:54,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:54,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:54,703 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:54,703 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:54,703 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 [2018-10-03 08:55:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:55:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:55,018 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:55,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:55,018 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:55,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:55,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:55,018 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:55,018 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:55,019 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:55,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:55,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-10-03 08:55:55,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:55,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:55,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:55,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:55,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:55,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:55,332 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 [2018-10-03 08:55:55,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:55,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:55,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:55,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:55,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:55,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:55,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:55,367 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:55,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:55,930 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:55:55,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:55,930 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:55,930 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:55:55,930 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:55:55,930 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 [2018-10-03 08:55:55,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:55:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:55:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:55:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:55:56,221 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:55:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:56,221 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:55:56,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:55:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:56,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:56,222 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:56,222 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:56,222 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:56,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-10-03 08:55:56,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:56,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:56,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:55:56,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:56,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:56,312 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 [2018-10-03 08:55:56,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:55:56,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:55:56,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:56,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:56,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:56,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:56,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:56,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:56,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:56,352 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:55:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:56,950 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:55:56,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:56,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:56,951 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:55:56,951 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:55:56,951 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 [2018-10-03 08:55:56,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:55:57,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:55:57,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:57,259 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:57,260 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:57,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:57,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:57,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:57,260 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:55:57,260 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:57,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-10-03 08:55:57,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:57,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:57,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:57,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:57,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:57,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:57,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:55:57,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:55:57,359 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:55:57,360 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:57,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:57,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:57,396 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:57,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:57,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:57,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:57,396 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:57,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:57,962 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:55:57,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:57,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:57,963 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:55:57,963 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:55:57,963 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 [2018-10-03 08:55:57,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:55:58,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-03 08:55:58,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:55:58,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:55:58,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:55:58,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:58,243 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:55:58,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:55:58,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:58,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:58,243 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:55:58,243 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:58,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-10-03 08:55:58,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:58,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:58,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:58,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:58,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:58,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:58,315 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 [2018-10-03 08:55:58,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:55:58,328 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:55:58,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:58,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:58,353 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:58,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:58,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:58,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:58,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:58,353 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:55:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:58,900 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:58,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:58,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:58,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:58,901 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:58,901 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:58,901 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 [2018-10-03 08:55:58,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:55:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-03 08:55:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:55:59,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:55:59,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:55:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:55:59,225 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:55:59,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:55:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:55:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:55:59,225 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:55:59,225 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:55:59,225 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:55:59,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:55:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-10-03 08:55:59,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:55:59,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:55:59,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:59,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:55:59,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:55:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:55:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:59,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:55:59,300 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 [2018-10-03 08:55:59,309 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:55:59,319 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:55:59,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:55:59,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:55:59,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:55:59,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:55:59,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:55:59,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:55:59,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:55:59,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:55:59,343 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:55:59,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:55:59,888 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:55:59,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:55:59,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:55:59,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:55:59,889 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:55:59,889 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:55:59,889 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 [2018-10-03 08:55:59,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:56:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:56:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:00,208 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:00,208 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:00,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:00,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:00,209 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:00,209 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:00,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:00,209 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-10-03 08:56:00,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:00,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:00,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:00,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:00,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:00,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:00,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:00,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:00,295 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:00,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:00,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:00,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:00,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:00,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:00,319 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:00,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:00,844 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:56:00,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:00,844 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:00,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:00,845 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:56:00,845 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:56:00,845 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 [2018-10-03 08:56:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:56:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:56:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:01,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:01,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:01,170 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:01,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:01,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:01,171 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:01,171 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:01,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:01,171 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-10-03 08:56:01,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:01,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:01,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:01,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:01,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:01,240 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:01,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:01,240 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 [2018-10-03 08:56:01,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:01,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:01,275 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:01,275 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:01,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:01,276 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:01,782 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:01,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:01,782 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:01,783 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:01,783 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:01,783 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 [2018-10-03 08:56:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-03 08:56:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:56:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:56:01,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-03 08:56:01,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:01,993 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:56:01,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:56:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:01,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:01,994 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-03 08:56:01,994 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:01,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-10-03 08:56:01,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:01,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:01,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:01,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:01,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:02,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:02,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:02,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:02,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:02,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:02,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:02,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:02,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:02,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:02,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:02,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:02,104 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-03 08:56:02,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:02,702 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:56:02,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:02,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:02,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:02,702 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:56:02,702 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:56:02,702 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 [2018-10-03 08:56:02,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:56:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:56:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:03,025 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:03,025 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:03,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:03,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:03,025 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:03,026 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:03,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:03,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-10-03 08:56:03,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:03,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:03,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:03,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:03,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:03,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:03,095 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 [2018-10-03 08:56:03,102 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:03,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:03,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:03,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:03,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:03,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:03,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:03,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:03,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:03,139 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:03,731 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:56:03,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:03,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:03,732 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:56:03,732 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:56:03,732 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 [2018-10-03 08:56:03,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:56:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:56:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:04,073 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:04,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:04,073 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:04,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:04,073 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:04,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:04,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:04,073 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:04,073 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:04,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:04,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-10-03 08:56:04,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:04,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:04,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:04,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:04,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:04,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:04,145 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 [2018-10-03 08:56:04,153 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:04,158 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:04,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:04,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:04,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:04,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:04,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:04,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:04,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:04,193 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:04,856 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:56:04,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:04,856 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:04,856 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:56:04,856 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:56:04,856 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 [2018-10-03 08:56:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:56:05,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:56:05,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:05,179 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:05,180 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:05,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:05,180 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:05,180 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:05,180 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:05,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-10-03 08:56:05,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:05,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:05,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:05,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:05,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:05,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:05,254 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:05,263 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:05,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:05,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:05,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:05,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:05,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:05,288 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:05,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:05,851 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:56:05,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:05,851 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:05,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:05,852 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:56:05,852 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:56:05,852 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 [2018-10-03 08:56:05,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:56:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-03 08:56:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:56:06,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:56:06,144 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:56:06,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:06,145 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:56:06,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:06,145 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:56:06,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:06,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:06,145 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:06,145 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:06,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:06,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-10-03 08:56:06,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:06,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:06,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:06,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:06,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:06,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:06,216 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 [2018-10-03 08:56:06,224 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:06,235 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:06,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:06,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:06,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:06,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:06,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:06,260 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:56:06,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:06,804 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:56:06,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:06,804 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:06,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:06,804 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:56:06,804 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:56:06,804 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 [2018-10-03 08:56:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:56:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:56:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:07,134 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:07,135 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:07,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:07,135 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:07,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:07,135 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:07,135 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:07,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:07,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-10-03 08:56:07,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:07,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:07,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:07,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:07,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:07,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:07,205 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 [2018-10-03 08:56:07,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:07,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:07,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:07,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:07,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:07,245 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:07,805 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:56:07,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:07,805 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:07,806 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:56:07,806 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:56:07,806 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 [2018-10-03 08:56:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:56:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-03 08:56:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:08,195 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:08,195 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:08,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:08,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:08,195 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:08,195 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:08,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-10-03 08:56:08,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:08,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:08,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:08,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:08,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:08,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:08,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:08,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:08,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:08,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:08,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:08,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:08,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:08,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:08,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:08,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:08,301 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:08,850 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:08,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:08,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:08,851 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:08,851 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:08,851 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 [2018-10-03 08:56:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:56:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:09,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:09,170 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:09,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:09,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:09,170 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:09,170 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:09,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-10-03 08:56:09,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:09,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:09,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:09,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:09,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:09,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:09,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:09,250 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:09,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:09,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:09,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:09,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:09,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:09,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:09,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:09,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:09,285 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:09,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:09,787 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:56:09,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:09,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:09,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:09,787 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:56:09,787 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:56:09,788 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 [2018-10-03 08:56:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:56:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-03 08:56:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:56:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:56:10,074 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:56:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:10,074 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:56:10,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:10,074 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:56:10,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:10,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:10,074 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:10,074 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:10,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:10,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-10-03 08:56:10,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:10,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:10,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:10,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:10,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:10,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:10,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:10,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:10,154 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:10,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:10,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:10,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:10,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:10,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:10,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:10,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:10,178 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:56:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:10,787 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:56:10,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:10,787 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:10,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:10,788 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:56:10,788 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:56:10,788 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 [2018-10-03 08:56:10,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:56:11,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:56:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:11,127 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:11,127 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:11,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:11,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:11,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:11,128 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:11,128 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:11,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:11,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-10-03 08:56:11,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:11,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:11,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:11,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:11,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:11,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:11,212 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 [2018-10-03 08:56:11,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:11,229 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:11,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:11,230 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:11,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:11,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:11,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:11,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:11,254 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:11,860 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:56:11,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:11,860 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:11,861 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:56:11,861 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:56:11,861 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 [2018-10-03 08:56:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:56:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:56:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:12,188 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:12,188 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:12,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:12,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:12,189 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:12,189 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:12,189 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:12,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:12,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-10-03 08:56:12,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:12,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:12,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:12,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:12,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:12,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:12,257 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 [2018-10-03 08:56:12,263 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:12,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:12,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:12,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:12,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:12,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:12,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:12,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:12,298 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:12,914 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:56:12,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:12,914 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:12,914 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:56:12,915 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:56:12,915 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 [2018-10-03 08:56:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:56:13,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:56:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:13,250 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:13,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:13,250 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:13,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:13,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:13,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:13,250 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:13,250 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:13,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:13,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-10-03 08:56:13,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:13,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:13,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:13,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:13,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:13,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:13,323 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:13,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:13,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:13,362 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:13,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:13,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:13,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:13,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:13,362 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:13,958 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:56:13,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:13,958 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:13,959 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:56:13,959 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:56:13,959 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 [2018-10-03 08:56:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:56:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-03 08:56:14,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:56:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:56:14,338 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:56:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:14,338 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:56:14,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:56:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:14,338 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:14,338 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:14,339 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:14,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:14,339 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-10-03 08:56:14,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:14,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:14,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:14,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:14,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:14,410 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:14,410 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 [2018-10-03 08:56:14,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:14,422 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:14,422 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:14,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:14,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:14,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:14,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:14,446 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:56:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:14,999 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:56:14,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:14,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:15,000 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:56:15,000 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:56:15,000 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 [2018-10-03 08:56:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:56:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:56:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:15,339 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:15,339 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:15,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:15,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:15,339 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:15,340 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:15,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:15,340 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-10-03 08:56:15,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:15,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:15,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:15,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:15,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:15,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:15,409 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 [2018-10-03 08:56:15,417 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:15,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:15,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:15,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:15,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:15,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:15,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:15,449 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:16,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:16,003 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:56:16,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:16,003 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:16,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:16,004 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:56:16,004 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:56:16,004 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 [2018-10-03 08:56:16,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:56:16,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-03 08:56:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:16,353 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:16,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:16,353 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:16,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:16,353 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:16,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:16,354 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:16,354 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:16,354 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:16,354 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:16,354 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-10-03 08:56:16,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:16,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:16,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:16,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:16,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:16,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:16,420 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 [2018-10-03 08:56:16,429 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:16,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:16,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:16,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:16,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:16,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:16,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:16,458 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:16,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:16,990 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:16,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:16,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:16,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:16,991 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:16,991 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:16,991 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 [2018-10-03 08:56:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:56:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:17,349 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:17,349 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:17,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:17,350 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:17,350 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:17,350 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:17,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:17,350 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-10-03 08:56:17,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:17,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:17,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:17,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:17,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:17,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:17,420 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 [2018-10-03 08:56:17,427 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:17,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:17,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:17,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:17,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:17,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:17,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:17,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:17,462 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:17,965 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:56:17,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:17,965 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:17,966 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:56:17,966 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:56:17,966 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 [2018-10-03 08:56:17,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:56:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-03 08:56:18,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:56:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:56:18,229 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-03 08:56:18,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:18,229 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:56:18,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:18,229 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:56:18,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:18,230 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:18,230 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:18,230 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:18,230 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-10-03 08:56:18,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:18,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:18,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:18,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:18,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:18,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:18,341 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 [2018-10-03 08:56:18,347 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:18,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:18,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:18,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:18,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:18,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:18,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:18,383 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-03 08:56:18,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:18,922 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:18,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:18,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:18,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:18,923 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:18,923 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:18,923 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 [2018-10-03 08:56:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:56:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:19,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:19,271 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:19,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:19,272 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:19,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:19,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:19,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:19,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:19,272 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:19,272 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:19,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:19,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-10-03 08:56:19,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:19,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:19,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:19,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:19,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:19,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:19,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:19,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:19,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:19,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:19,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:19,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:19,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:19,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:19,386 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:20,368 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:20,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:20,368 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:20,368 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:20,368 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:20,369 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 [2018-10-03 08:56:20,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:56:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:20,690 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:20,690 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:20,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:20,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:20,690 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:20,691 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:20,691 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:20,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-10-03 08:56:20,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:20,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:20,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:20,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:20,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:20,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:20,757 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 [2018-10-03 08:56:20,765 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:20,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:20,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:20,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:20,795 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:20,795 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:20,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:20,795 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:21,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:21,320 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:56:21,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:21,320 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:21,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:21,321 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:56:21,321 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:56:21,321 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 [2018-10-03 08:56:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:56:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-03 08:56:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:21,667 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:21,667 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:21,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:21,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:21,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:21,668 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:21,668 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:21,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:21,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-10-03 08:56:21,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:21,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:21,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:21,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:21,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:21,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:21,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:21,746 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:21,755 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:21,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:21,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:21,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:21,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:21,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:21,781 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:22,271 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:56:22,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:22,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:22,271 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:56:22,271 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:56:22,272 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 [2018-10-03 08:56:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:56:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:56:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:56:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:56:22,595 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:56:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:22,595 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:56:22,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:56:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:22,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:22,595 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:22,596 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:22,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:22,596 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-10-03 08:56:22,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:22,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:22,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:22,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:22,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:22,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:22,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:22,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:22,678 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:22,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:22,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:22,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:22,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:22,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:22,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:22,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:22,703 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:56:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:23,244 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:23,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:23,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:23,245 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:23,245 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:23,245 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 [2018-10-03 08:56:23,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:56:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:23,606 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:23,606 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:23,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:23,607 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:23,607 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:23,607 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:23,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:23,607 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-10-03 08:56:23,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:23,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:23,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:23,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:23,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:23,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:23,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:23,681 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:23,690 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:23,691 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:23,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:23,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:23,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:23,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:23,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:23,715 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:24,262 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:24,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:24,262 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:24,263 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:24,263 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:24,263 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 [2018-10-03 08:56:24,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:56:24,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:24,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:24,610 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:24,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:24,610 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:24,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:24,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:24,611 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:24,611 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:24,611 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:24,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:24,611 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-10-03 08:56:24,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:24,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:24,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:24,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:24,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:24,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:24,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:24,689 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:24,703 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:24,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:24,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:24,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:24,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:24,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:24,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:24,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:24,737 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:25,285 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:56:25,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:25,285 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:25,285 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:56:25,285 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:56:25,285 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 [2018-10-03 08:56:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:56:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-03 08:56:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:25,614 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:25,615 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:25,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:25,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:25,615 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:25,615 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:25,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:25,615 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-10-03 08:56:25,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:25,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:25,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:25,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:25,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:25,690 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:25,690 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 [2018-10-03 08:56:25,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:25,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:25,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:25,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:25,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:25,728 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:26,235 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:56:26,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:26,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:26,236 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:56:26,236 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:56:26,236 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 [2018-10-03 08:56:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:56:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:56:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:56:26,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:56:26,524 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:56:26,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:26,524 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:56:26,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:26,524 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:56:26,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:26,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:26,525 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:26,525 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:26,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:26,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-10-03 08:56:26,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:26,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:26,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:26,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:26,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:26,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:26,592 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 [2018-10-03 08:56:26,600 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:26,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:26,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:26,607 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:26,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:26,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:26,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:26,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:26,630 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:56:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:27,125 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:56:27,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:27,125 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:27,126 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:56:27,126 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:56:27,126 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 [2018-10-03 08:56:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:56:27,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-03 08:56:27,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:27,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:27,458 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:27,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:27,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:27,458 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:27,459 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:27,459 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-10-03 08:56:27,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:27,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:27,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:27,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:27,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:27,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:27,820 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 [2018-10-03 08:56:27,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:27,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:27,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:27,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:27,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:27,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:27,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:27,861 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:28,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:28,323 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:56:28,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:28,323 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:28,323 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:56:28,323 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:56:28,323 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 [2018-10-03 08:56:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:56:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-10-03 08:56:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:28,669 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:28,669 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:28,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:28,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:28,669 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:28,669 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:28,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:28,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-10-03 08:56:28,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:28,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:28,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:28,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:28,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:28,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:28,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:28,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:28,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:28,754 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:28,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:28,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:28,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:28,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:28,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:28,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:28,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:28,789 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:29,330 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:56:29,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:29,330 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:29,331 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:56:29,331 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:56:29,331 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 [2018-10-03 08:56:29,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:56:29,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-03 08:56:29,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:29,676 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:29,676 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:29,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:29,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:29,677 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:29,677 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:29,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:29,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-10-03 08:56:29,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:29,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:29,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:29,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:29,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:29,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:29,765 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 [2018-10-03 08:56:29,773 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:29,783 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:29,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:29,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:29,806 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:29,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:29,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:29,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:29,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:29,807 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:30,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:30,296 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-10-03 08:56:30,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:30,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:30,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:30,296 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:56:30,296 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:56:30,297 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 [2018-10-03 08:56:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:56:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-10-03 08:56:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:56:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:56:30,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:56:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:30,616 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:56:30,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:56:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:30,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:30,617 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:30,617 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:30,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-10-03 08:56:30,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:30,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:30,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:30,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:30,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:30,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:30,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:30,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:30,706 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:30,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:30,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:30,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:30,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:30,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:30,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:30,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:30,737 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:56:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:31,189 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:56:31,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:31,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:31,190 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:56:31,190 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:56:31,190 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 [2018-10-03 08:56:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:56:31,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-10-03 08:56:31,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:31,546 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:31,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:31,546 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:31,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:31,546 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:31,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:31,546 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:31,547 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:31,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:31,547 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-10-03 08:56:31,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:31,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:31,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:31,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:31,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:31,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:31,615 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 [2018-10-03 08:56:31,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:31,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:31,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:31,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:31,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:31,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:31,652 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:32,110 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-10-03 08:56:32,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:32,110 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:32,111 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:56:32,111 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:56:32,111 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 [2018-10-03 08:56:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:56:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-10-03 08:56:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:32,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:32,477 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:32,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:32,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:32,477 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:32,477 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:32,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:32,478 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-10-03 08:56:32,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:32,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:32,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:32,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:32,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:32,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:32,546 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 [2018-10-03 08:56:32,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:32,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:32,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:32,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:32,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:32,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:32,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:32,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:32,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:32,584 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:33,004 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-10-03 08:56:33,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:33,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:33,005 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:56:33,005 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:56:33,005 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 [2018-10-03 08:56:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:56:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-03 08:56:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:33,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:33,359 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:33,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:33,359 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:33,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:33,360 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:33,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:33,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:33,360 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:33,360 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:33,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-10-03 08:56:33,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:33,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:33,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:33,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:33,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:33,528 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 [2018-10-03 08:56:33,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:33,550 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:33,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:33,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:33,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:33,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:33,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:33,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:33,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:33,582 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:34,043 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-10-03 08:56:34,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:34,043 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:34,044 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:56:34,044 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:56:34,044 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 [2018-10-03 08:56:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:56:34,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-10-03 08:56:34,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:56:34,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-10-03 08:56:34,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-10-03 08:56:34,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:34,275 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-10-03 08:56:34,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:34,275 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-10-03 08:56:34,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:34,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:34,276 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-10-03 08:56:34,276 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:34,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:34,276 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-10-03 08:56:34,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:34,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:34,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:34,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:34,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:34,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:34,346 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 [2018-10-03 08:56:34,355 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:34,399 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:34,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:34,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:34,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:34,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:34,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:34,436 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-10-03 08:56:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:35,385 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:56:35,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:35,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:35,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:35,386 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:56:35,386 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:56:35,386 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 [2018-10-03 08:56:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:56:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:56:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:35,791 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:35,791 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:35,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:35,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:35,792 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:35,792 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:35,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-10-03 08:56:35,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:35,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:35,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:35,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:35,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:35,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:35,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:35,876 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 [2018-10-03 08:56:35,883 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:35,893 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:35,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:35,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:35,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:35,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:35,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:35,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:35,918 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:36,728 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:56:36,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:36,728 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:36,729 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:56:36,729 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:56:36,729 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 [2018-10-03 08:56:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:56:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:56:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:37,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:37,113 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:37,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:37,113 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:37,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:37,114 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:37,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:37,114 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:37,114 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:37,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:37,114 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-10-03 08:56:37,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:37,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:37,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:37,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:37,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:37,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:37,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:37,189 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:37,200 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:37,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:37,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:37,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:37,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:37,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:37,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:37,224 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:37,987 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:56:37,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:37,987 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:37,987 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:56:37,987 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:56:37,987 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 [2018-10-03 08:56:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:56:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:56:38,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:38,365 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:38,365 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:38,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:38,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:38,365 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:38,365 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:38,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:38,366 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-10-03 08:56:38,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:38,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:38,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:38,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:38,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:38,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:38,556 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 [2018-10-03 08:56:38,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:38,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:38,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:38,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:38,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:38,590 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:39,322 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:56:39,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:39,322 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:39,323 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:56:39,323 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:56:39,323 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 [2018-10-03 08:56:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:56:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-03 08:56:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:56:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:56:39,695 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:56:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:39,696 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:56:39,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:56:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:39,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:39,696 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:39,696 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:39,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:39,697 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-10-03 08:56:39,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:39,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:39,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:39,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:39,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:39,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:39,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:39,768 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 [2018-10-03 08:56:39,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:39,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:39,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:39,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:39,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:39,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:39,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:39,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:39,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:39,808 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:56:40,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:40,596 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:56:40,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:40,596 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:40,597 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:56:40,597 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:56:40,597 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 [2018-10-03 08:56:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:56:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:56:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:41,071 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:41,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:41,071 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:41,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:41,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:41,071 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:41,071 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:41,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-10-03 08:56:41,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:41,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:41,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:41,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:41,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:41,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:41,145 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 [2018-10-03 08:56:41,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:41,162 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:41,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:41,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:41,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:41,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:41,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:41,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:41,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:41,186 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:41,984 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:56:41,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:41,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:41,985 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:56:41,985 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:56:41,985 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 [2018-10-03 08:56:41,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:56:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:56:42,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:42,385 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:42,385 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:42,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:42,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:42,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:42,386 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:42,386 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:42,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:42,386 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-10-03 08:56:42,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:42,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:42,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:42,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:42,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:42,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:42,469 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 [2018-10-03 08:56:42,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:42,484 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:42,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:42,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:42,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:42,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:42,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:42,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:42,509 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:43,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:43,289 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:56:43,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:43,289 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:43,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:43,290 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:56:43,290 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:56:43,290 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 [2018-10-03 08:56:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:56:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:56:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:43,673 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:43,673 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:43,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:43,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:43,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:43,673 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:43,673 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:43,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-10-03 08:56:43,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:43,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:43,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:43,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:43,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:43,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:43,778 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 [2018-10-03 08:56:43,787 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:43,801 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:43,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:43,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:43,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:43,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:43,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:43,835 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:44,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:44,729 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:56:44,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:44,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:44,730 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:56:44,730 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:56:44,730 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 [2018-10-03 08:56:44,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:56:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-03 08:56:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:56:45,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:56:45,070 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:56:45,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:45,070 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:56:45,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:56:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:45,070 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:45,070 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:45,071 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:45,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-10-03 08:56:45,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:45,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:45,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:45,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:45,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:45,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:45,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:45,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:45,186 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:45,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:45,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:45,213 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:45,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:45,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:45,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:45,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:45,214 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:56:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:45,955 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:56:45,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:45,955 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:45,956 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:56:45,956 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:56:45,956 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 [2018-10-03 08:56:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:56:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:56:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:46,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:46,362 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:46,362 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:46,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:46,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:46,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:46,362 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:46,362 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:46,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-10-03 08:56:46,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:46,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:46,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:46,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:46,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:46,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:46,428 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 [2018-10-03 08:56:46,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:46,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:46,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:46,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:46,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:46,475 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:47,203 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:56:47,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:47,203 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:47,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:47,204 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:56:47,204 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:56:47,204 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 [2018-10-03 08:56:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:56:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:56:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:47,615 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:47,615 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:47,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:47,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:47,615 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:47,615 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:47,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:47,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-10-03 08:56:47,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:47,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:47,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:47,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:47,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:47,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:47,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:47,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:47,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:47,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:47,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:47,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:47,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:47,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:47,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:47,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:47,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:47,724 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:48,481 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:56:48,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:48,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:48,482 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:56:48,482 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:56:48,482 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 [2018-10-03 08:56:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:56:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:56:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:48,866 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:48,866 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:48,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:48,866 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:48,866 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:48,866 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:48,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:48,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-10-03 08:56:48,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:48,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:48,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:48,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:48,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:48,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:49,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:49,076 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 [2018-10-03 08:56:49,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:49,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:49,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:49,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:49,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:49,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:49,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:49,116 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:49,829 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:56:49,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:49,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:49,829 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:56:49,829 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:56:49,829 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 [2018-10-03 08:56:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:56:50,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-03 08:56:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:56:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:56:50,190 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:56:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:50,190 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:56:50,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:56:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:50,190 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:50,190 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:50,190 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:50,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-10-03 08:56:50,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:50,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:50,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:50,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:50,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:50,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:50,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:50,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:50,284 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:50,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:50,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:50,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:50,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:50,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:50,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:50,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:50,307 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:56:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:50,989 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:56:50,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:50,989 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:50,990 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:56:50,990 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:56:50,990 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 [2018-10-03 08:56:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:56:51,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-03 08:56:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:51,393 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:51,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:51,393 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:51,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:51,393 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:51,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:51,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:51,393 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:51,394 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:51,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-10-03 08:56:51,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:51,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:51,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:51,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:51,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:51,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:51,460 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 [2018-10-03 08:56:51,468 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:51,479 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:51,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:51,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:51,502 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:51,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:51,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:51,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:51,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:51,503 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:52,188 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:56:52,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:52,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:52,189 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:56:52,189 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:56:52,189 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 [2018-10-03 08:56:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:56:52,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:56:52,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:52,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:52,585 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:52,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:52,585 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:52,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:52,585 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:52,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:52,585 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:52,585 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:52,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-10-03 08:56:52,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:52,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:52,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:52,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:52,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:52,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:52,654 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 [2018-10-03 08:56:52,668 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:56:52,677 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:56:52,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:52,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:52,681 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:52,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:52,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:52,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:52,701 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:53,348 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:56:53,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:53,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:53,349 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:56:53,349 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:56:53,349 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 [2018-10-03 08:56:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:56:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:56:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:53,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:53,759 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:53,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:53,759 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:53,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:53,760 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:53,760 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:53,760 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:53,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:53,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-10-03 08:56:53,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:53,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:53,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:53,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:53,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:53,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:53,864 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 [2018-10-03 08:56:53,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:53,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:53,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:53,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:53,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:53,902 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:54,515 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:56:54,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:54,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:54,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:54,516 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:56:54,516 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:56:54,516 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 [2018-10-03 08:56:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:56:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-10-03 08:56:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:56:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:56:54,825 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-03 08:56:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:54,825 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:56:54,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:56:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:54,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:54,826 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:56:54,826 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:54,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:54,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-10-03 08:56:54,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:54,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:54,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:56:54,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:54,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:54,928 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 [2018-10-03 08:56:54,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:56:54,952 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:56:54,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:54,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:54,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:54,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:54,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:54,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:54,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:54,975 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-03 08:56:55,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:55,800 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:56:55,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:55,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:55,801 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:56:55,801 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:56:55,801 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 [2018-10-03 08:56:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:56:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:56:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:56,222 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:56,222 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:56,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:56,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:56,223 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:56,223 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:56,223 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:56,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-10-03 08:56:56,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:56,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:56,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:56,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,290 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:56,290 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 [2018-10-03 08:56:56,298 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:56:56,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:56:56,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:56,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:56,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:56,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:56,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:56,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:56,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:56,339 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:57,170 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:56:57,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:57,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:57,170 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:56:57,170 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:56:57,171 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 [2018-10-03 08:56:57,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:56:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:56:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:56:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:56:57,573 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:56:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:57,573 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:56:57,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:56:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:57,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:57,573 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:56:57,573 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:57,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:57,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-10-03 08:56:57,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:57,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:57,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:57,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:57,644 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:57,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:56:57,657 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:56:57,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:57,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:57,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:57,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:57,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:57,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:57,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:57,681 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:56:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:58,474 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:56:58,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:58,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:58,475 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:56:58,475 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:56:58,475 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 [2018-10-03 08:56:58,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:56:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:56:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:56:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:56:58,887 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:56:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:56:58,887 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:56:58,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:56:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:56:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:56:58,887 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:56:58,887 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:56:58,887 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:56:58,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:56:58,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-10-03 08:56:58,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:56:58,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:56:58,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:56:58,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:56:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:56:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:58,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:56:58,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:56:58,991 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:56:59,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:56:59,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:56:59,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:56:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:56:59,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:56:59,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:56:59,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:56:59,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:56:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:56:59,029 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:56:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:56:59,810 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:56:59,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:56:59,810 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:56:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:56:59,811 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:56:59,811 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:56:59,811 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 [2018-10-03 08:56:59,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:57:00,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-10-03 08:57:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:00,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:57:00,172 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:57:00,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:00,172 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:57:00,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:00,172 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:57:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:00,172 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:00,172 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:00,173 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:00,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:00,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-10-03 08:57:00,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:00,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:00,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:00,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:00,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:00,241 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 [2018-10-03 08:57:00,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:00,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:00,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:00,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:00,306 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:00,306 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:00,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:00,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:00,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:00,307 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:57:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:01,143 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:57:01,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:01,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:01,144 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:57:01,144 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:57:01,144 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 [2018-10-03 08:57:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:57:01,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-10-03 08:57:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:01,536 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:01,536 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:01,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:01,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:01,536 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:01,537 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:01,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:01,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-10-03 08:57:01,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:01,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:01,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:01,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:01,624 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 [2018-10-03 08:57:01,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:01,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:01,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:01,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:01,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:01,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:01,660 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:02,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:02,510 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-10-03 08:57:02,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:02,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:02,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:02,510 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:57:02,510 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:57:02,511 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 [2018-10-03 08:57:02,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:57:02,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-10-03 08:57:02,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:02,921 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:02,921 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:02,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:02,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:02,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:02,921 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:02,921 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:02,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-10-03 08:57:02,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:02,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:02,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:02,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:02,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:02,994 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 [2018-10-03 08:57:03,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:03,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:03,010 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:03,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:03,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:03,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:03,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:03,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:03,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:03,033 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:03,813 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-10-03 08:57:03,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:03,813 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:03,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:03,814 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:57:03,814 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:57:03,814 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 [2018-10-03 08:57:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:57:04,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-10-03 08:57:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:04,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:04,236 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:04,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:04,236 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:04,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:04,237 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:04,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:04,237 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:04,237 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:04,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:04,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-10-03 08:57:04,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:04,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:04,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:04,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:04,398 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 [2018-10-03 08:57:04,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:04,416 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:04,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:04,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:04,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:04,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:04,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:04,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:04,443 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:05,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:05,208 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:57:05,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:05,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:05,209 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:57:05,209 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:57:05,209 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 [2018-10-03 08:57:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:57:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-10-03 08:57:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:57:05,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:57:05,563 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:57:05,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:05,563 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:57:05,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:05,563 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:57:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:05,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:05,564 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:05,564 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:05,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:05,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-10-03 08:57:05,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:05,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:05,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:05,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:05,944 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 [2018-10-03 08:57:05,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:05,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:05,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:05,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:05,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:05,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:05,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:05,985 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:57:06,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:06,823 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:57:06,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:06,823 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:06,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:06,824 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:57:06,824 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:57:06,824 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 [2018-10-03 08:57:06,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:57:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:57:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:07,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:07,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:07,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:07,254 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:07,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:07,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:07,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:07,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:07,255 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:07,255 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:07,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-10-03 08:57:07,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:07,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:07,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:07,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:07,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:07,326 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 [2018-10-03 08:57:07,333 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:07,346 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:57:07,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:07,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:07,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:07,369 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:07,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:07,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:07,370 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:08,099 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:57:08,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:08,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:08,100 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:57:08,100 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:08,100 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 [2018-10-03 08:57:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-10-03 08:57:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:08,515 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:08,515 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:08,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:08,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:08,515 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:08,515 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:08,515 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:08,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:08,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-10-03 08:57:08,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:08,516 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:08,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:08,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:08,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:08,585 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:08,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:08,592 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:08,601 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:08,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:08,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:08,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:08,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:08,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:08,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:08,627 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:09,399 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-10-03 08:57:09,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:09,399 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:09,399 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:57:09,399 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:57:09,399 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 [2018-10-03 08:57:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:57:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-10-03 08:57:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:09,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:09,817 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:09,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:09,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:09,817 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:09,817 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:09,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-10-03 08:57:09,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:09,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:09,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:09,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:09,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:09,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:09,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:09,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:09,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:09,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:09,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:09,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:09,922 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:10,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:10,674 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:57:10,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:10,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:10,675 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:57:10,675 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:10,675 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 [2018-10-03 08:57:10,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:11,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-10-03 08:57:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:57:11,044 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:57:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:11,044 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:57:11,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:11,045 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:57:11,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:11,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:11,045 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:11,045 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:11,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-10-03 08:57:11,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:11,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:11,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:11,120 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:11,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:11,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:11,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:11,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:11,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:11,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:11,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:11,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:11,161 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:57:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:11,874 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:57:11,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:11,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:11,874 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:11,875 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:57:11,875 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 [2018-10-03 08:57:11,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:57:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-10-03 08:57:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:12,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:12,318 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:12,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:12,318 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:12,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:12,318 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:12,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:12,318 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:12,318 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:12,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:12,319 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-10-03 08:57:12,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:12,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:12,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:12,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:12,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:12,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:12,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:12,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:12,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:12,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:12,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:12,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:12,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:12,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:12,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:12,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:12,474 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:13,178 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:57:13,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:13,178 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:13,179 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:13,179 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:57:13,179 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 [2018-10-03 08:57:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:57:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:57:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:13,592 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:13,592 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:13,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:13,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:13,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:13,592 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:13,592 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:13,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:13,592 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-10-03 08:57:13,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:13,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:13,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:13,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,671 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:13,671 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 [2018-10-03 08:57:13,679 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:13,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:13,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:13,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:13,708 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:13,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:13,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:13,709 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:14,376 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:57:14,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:14,376 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:14,376 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:57:14,376 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:57:14,377 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 [2018-10-03 08:57:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:57:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:57:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:14,774 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:14,774 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:14,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:14,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:14,774 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:14,774 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:57:14,774 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:14,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:14,774 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-10-03 08:57:14,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:14,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:14,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:14,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:14,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:14,996 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 [2018-10-03 08:57:15,002 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:15,013 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:57:15,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:15,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:15,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:15,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:15,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:15,037 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:15,689 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:57:15,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:15,689 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:15,689 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:15,689 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:15,690 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 [2018-10-03 08:57:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-10-03 08:57:15,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:57:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-10-03 08:57:15,963 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-10-03 08:57:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:15,963 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-10-03 08:57:15,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-10-03 08:57:15,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:15,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:15,963 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:57:15,963 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:15,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-10-03 08:57:15,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:15,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:15,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:15,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:15,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:16,030 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 [2018-10-03 08:57:16,038 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:16,046 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:16,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:16,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:16,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:16,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:16,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:16,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:16,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:16,072 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-10-03 08:57:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:16,857 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:57:16,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:16,857 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:16,858 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:57:16,858 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:16,858 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 [2018-10-03 08:57:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:17,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:57:17,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:17,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:17,303 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:17,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:17,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:17,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:17,304 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:17,304 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:17,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:17,304 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-10-03 08:57:17,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:17,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:17,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:17,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:17,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:17,381 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:17,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:17,382 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 [2018-10-03 08:57:17,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:17,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:17,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:17,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:17,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:17,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:17,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:17,419 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:18,152 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:57:18,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:18,152 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:18,152 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:18,152 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:57:18,152 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 [2018-10-03 08:57:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:57:18,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:57:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:18,584 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:18,584 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:18,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:18,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:18,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:18,584 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:18,584 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:18,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:18,585 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-10-03 08:57:18,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:18,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:18,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:18,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:18,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:18,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:18,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:18,706 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:18,706 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:18,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:18,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:18,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:18,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:18,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:18,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:18,730 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:19,504 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:57:19,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:19,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:19,504 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:57:19,504 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:19,504 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 [2018-10-03 08:57:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:19,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:57:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:19,946 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:19,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:19,947 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:19,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:19,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:19,947 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:19,947 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:19,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-10-03 08:57:19,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:19,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:19,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:19,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:19,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:20,095 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:20,095 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 [2018-10-03 08:57:20,101 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:20,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:20,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:20,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:20,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:20,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:20,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:20,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:20,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:20,137 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:20,879 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:57:20,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:20,879 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:20,879 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:20,879 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:57:20,879 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 [2018-10-03 08:57:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:57:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-03 08:57:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:57:21,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:57:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:21,293 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:57:21,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:57:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:21,294 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:21,294 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:21,294 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:21,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-10-03 08:57:21,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:21,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:21,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:21,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:21,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:21,367 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 [2018-10-03 08:57:21,387 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:21,415 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:21,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:21,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:21,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:21,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:21,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:21,449 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:57:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:22,168 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:57:22,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:22,168 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:22,169 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:57:22,169 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:57:22,169 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 [2018-10-03 08:57:22,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:57:22,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:57:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:22,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:22,608 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:22,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:22,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:22,609 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:22,609 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:22,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:22,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-10-03 08:57:22,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:22,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:22,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:22,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:22,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:22,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:22,694 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:22,703 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:57:22,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:22,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:22,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:22,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:22,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:22,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:22,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:22,728 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:23,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:23,432 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:57:23,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:23,432 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:23,433 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:57:23,433 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:57:23,433 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 [2018-10-03 08:57:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:57:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-03 08:57:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:23,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:23,870 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:23,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:23,870 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:23,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:23,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:23,871 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:23,871 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:23,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:23,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-10-03 08:57:23,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:23,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:23,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:23,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:23,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:23,956 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:23,966 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:23,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:23,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:23,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:23,990 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:23,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:23,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:23,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:23,991 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:24,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:24,658 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:57:24,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:24,658 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:24,658 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:24,658 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:24,658 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 [2018-10-03 08:57:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:57:25,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:25,082 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:25,082 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:25,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:25,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:25,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:25,083 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:25,083 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:25,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:25,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-10-03 08:57:25,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:25,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:25,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:25,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:25,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:25,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:25,151 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 [2018-10-03 08:57:25,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:25,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:25,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:25,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:25,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:25,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:25,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:25,188 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:25,843 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:57:25,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:25,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:25,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:25,843 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:57:25,843 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:57:25,843 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 [2018-10-03 08:57:25,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:57:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-10-03 08:57:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:57:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:57:26,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:57:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:26,213 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:57:26,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:57:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:26,213 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:26,213 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:26,213 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:26,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-10-03 08:57:26,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:26,214 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:26,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:26,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:26,281 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 [2018-10-03 08:57:26,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:26,294 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:26,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:26,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:26,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:26,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:26,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:26,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:26,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:26,318 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:57:27,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:27,105 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:57:27,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:27,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:27,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:27,105 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:57:27,105 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:27,105 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 [2018-10-03 08:57:27,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:27,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:57:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:27,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:27,544 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:27,544 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:27,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:27,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:27,544 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:27,545 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:27,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-10-03 08:57:27,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:27,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:27,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:27,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:27,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:27,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:27,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:27,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:27,630 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:27,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:27,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:27,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:27,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:27,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:27,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:27,664 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:28,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:28,423 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:57:28,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:28,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:28,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:28,423 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:28,423 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:57:28,424 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 [2018-10-03 08:57:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:57:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-10-03 08:57:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:28,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:28,855 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:28,855 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:28,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:28,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:28,856 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:28,856 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:28,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:28,856 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-10-03 08:57:28,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:28,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:28,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:28,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:28,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:28,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:28,933 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 [2018-10-03 08:57:28,939 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:28,945 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:28,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:28,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:28,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:28,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:28,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:28,969 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:29,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:29,739 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-10-03 08:57:29,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:29,739 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:29,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:29,739 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:57:29,739 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:57:29,739 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 [2018-10-03 08:57:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:57:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-10-03 08:57:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:30,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:30,187 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:30,187 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:30,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:30,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:30,188 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:30,188 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:30,188 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:30,188 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-10-03 08:57:30,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:30,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:30,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:30,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:30,283 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 [2018-10-03 08:57:30,290 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:30,299 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:57:30,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:30,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:30,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:30,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:30,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:30,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:30,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:30,324 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:31,065 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-10-03 08:57:31,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:31,065 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:31,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:31,066 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:57:31,066 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:57:31,066 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 [2018-10-03 08:57:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:57:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-10-03 08:57:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:57:31,497 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:57:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:31,498 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:57:31,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:57:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:31,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:31,498 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:31,498 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:31,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:31,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-10-03 08:57:31,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:31,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:31,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:31,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:31,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:31,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:31,579 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 [2018-10-03 08:57:31,586 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:31,595 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:31,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:31,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:31,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:31,618 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:31,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:31,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:31,619 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:57:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:32,324 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:57:32,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:32,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:32,324 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:57:32,324 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:57:32,324 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 [2018-10-03 08:57:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:57:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-10-03 08:57:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:32,781 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:32,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:32,781 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:32,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:32,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:32,781 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:32,782 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:32,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:32,782 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-10-03 08:57:32,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:32,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:32,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:32,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:32,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:32,851 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:32,851 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 [2018-10-03 08:57:32,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:32,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:32,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:32,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:32,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:32,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:32,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:32,887 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:33,613 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-10-03 08:57:33,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:33,613 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:33,614 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:57:33,614 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:57:33,614 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 [2018-10-03 08:57:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:57:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-10-03 08:57:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:34,030 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:34,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:34,030 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:34,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:34,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:34,030 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:34,031 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:34,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-10-03 08:57:34,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:34,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:34,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:34,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:34,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:34,099 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:34,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:34,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:34,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:34,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:34,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:34,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:34,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:34,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:34,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:34,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:34,139 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:34,827 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:57:34,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:34,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:34,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:34,827 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:34,827 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:34,827 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 [2018-10-03 08:57:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:57:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:35,263 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:35,263 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:35,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:35,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:35,263 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:57:35,264 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:35,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:35,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-10-03 08:57:35,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:35,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:35,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:35,265 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:35,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:35,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:35,335 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 [2018-10-03 08:57:35,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:35,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:35,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:35,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:35,376 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:35,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:35,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:35,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:35,377 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:36,026 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:57:36,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:36,026 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:36,026 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:57:36,027 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:57:36,027 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 [2018-10-03 08:57:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:57:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-10-03 08:57:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:57:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-10-03 08:57:36,369 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-10-03 08:57:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:36,369 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-10-03 08:57:36,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-10-03 08:57:36,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:36,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:36,369 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:36,370 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:36,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:36,370 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-10-03 08:57:36,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:36,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:36,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:36,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:36,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,437 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:36,437 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 [2018-10-03 08:57:36,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:36,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:36,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:36,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:36,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:36,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:36,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:36,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:36,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:36,475 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-10-03 08:57:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:37,136 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:57:37,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:37,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:37,137 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:37,137 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:37,137 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 [2018-10-03 08:57:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:37,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:57:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:37,571 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:37,571 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:37,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:37,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:37,572 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:37,572 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:37,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:37,572 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-10-03 08:57:37,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:37,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:37,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:37,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:37,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:37,641 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 [2018-10-03 08:57:37,648 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:37,658 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:57:37,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:37,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:37,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:37,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:37,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:37,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:37,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:37,692 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:38,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:38,393 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:57:38,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:38,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:38,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:38,394 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:38,394 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:38,394 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 [2018-10-03 08:57:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:57:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:38,840 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:38,840 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:38,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:38,840 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:38,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:38,840 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:38,840 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:38,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:38,841 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-10-03 08:57:38,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:38,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:38,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:38,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:38,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:38,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:38,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:38,926 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:38,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:38,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:38,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:38,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:38,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:38,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:38,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:38,950 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:39,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:39,617 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:57:39,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:39,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:39,618 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:57:39,618 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:57:39,618 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 [2018-10-03 08:57:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:57:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-03 08:57:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:40,086 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:40,086 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:40,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:40,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:40,086 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:40,086 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:40,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:40,087 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-10-03 08:57:40,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:40,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:40,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:40,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:40,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:40,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:40,293 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 [2018-10-03 08:57:40,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:40,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:40,328 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:40,328 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:40,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:40,328 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:40,940 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:57:40,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:40,940 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:40,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:40,941 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:57:40,941 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:57:40,941 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 [2018-10-03 08:57:40,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:57:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-10-03 08:57:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:57:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-10-03 08:57:41,351 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-10-03 08:57:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:41,352 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-10-03 08:57:41,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-10-03 08:57:41,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:41,352 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:41,352 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:41,352 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:41,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-10-03 08:57:41,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:41,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:41,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,353 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:41,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:41,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:41,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:41,420 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 [2018-10-03 08:57:41,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:57:41,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:57:41,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:41,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:41,456 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:41,456 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:41,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:41,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:41,457 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-10-03 08:57:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:42,132 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:57:42,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:42,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:42,133 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:42,133 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:42,133 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 [2018-10-03 08:57:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-10-03 08:57:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:42,591 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:42,592 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:42,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:42,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:42,592 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:42,592 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:42,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-10-03 08:57:42,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:42,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:42,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:42,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:42,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:42,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:42,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:57:42,683 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:57:42,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:42,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:42,686 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:42,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:42,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:42,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:42,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:42,708 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:43,381 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-10-03 08:57:43,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:43,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:43,382 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:57:43,382 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:57:43,382 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 [2018-10-03 08:57:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:57:43,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-10-03 08:57:43,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:57:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-10-03 08:57:43,839 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-10-03 08:57:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:43,840 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-10-03 08:57:43,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-10-03 08:57:43,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:43,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:43,840 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:43,840 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:43,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-10-03 08:57:43,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:43,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:43,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:43,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:43,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:43,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:43,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:43,925 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:57:43,932 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:57:43,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:43,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:43,956 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:43,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:43,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:43,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:43,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:43,957 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-10-03 08:57:44,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:44,608 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-10-03 08:57:44,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:44,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:44,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:44,609 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:57:44,609 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:57:44,609 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 [2018-10-03 08:57:44,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:57:45,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-10-03 08:57:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:45,072 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:45,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:45,072 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:45,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:45,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:45,072 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-10-03 08:57:45,072 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:45,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:45,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-10-03 08:57:45,072 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:45,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:45,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:45,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:45,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:45,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:45,171 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 [2018-10-03 08:57:45,178 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:57:45,193 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-03 08:57:45,193 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:45,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:45,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:45,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:45,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:45,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:45,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:45,216 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-10-03 08:57:45,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:45,837 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:57:45,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:45,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:45,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:45,838 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:57:45,838 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:57:45,838 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 [2018-10-03 08:57:45,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:57:46,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-10-03 08:57:46,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:57:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-10-03 08:57:46,212 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-10-03 08:57:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:46,212 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-10-03 08:57:46,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-10-03 08:57:46,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:46,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:46,212 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-10-03 08:57:46,213 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:46,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-10-03 08:57:46,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:46,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:46,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:46,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:46,310 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:46,310 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:57:46,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:57:46,328 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-03 08:57:46,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:57:46,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:46,356 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:46,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:46,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:46,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:46,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:46,356 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-10-03 08:57:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:57:46,946 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-10-03 08:57:46,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:57:46,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-10-03 08:57:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:57:46,946 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:57:46,946 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:57:46,946 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 [2018-10-03 08:57:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:57:47,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-10-03 08:57:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:57:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-10-03 08:57:47,398 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-10-03 08:57:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:57:47,399 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-10-03 08:57:47,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:57:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-10-03 08:57:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:57:47,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:57:47,399 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-10-03 08:57:47,399 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:57:47,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:57:47,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-10-03 08:57:47,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:57:47,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:57:47,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:47,400 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:57:47,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:57:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:47,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:57:47,467 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 [2018-10-03 08:57:47,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:57:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:57:47,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:57:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:57:47,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:57:47,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:57:47,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:57:47,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:57:47,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:57:47,502 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. Received shutdown request... [2018-10-03 08:57:47,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:57:47,795 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:57:47,800 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:57:47,800 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:57:47 BoogieIcfgContainer [2018-10-03 08:57:47,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:57:47,801 INFO L168 Benchmark]: Toolchain (without parser) took 258292.65 ms. Allocated memory was 1.6 GB in the beginning and 1.2 GB in the end (delta: -399.0 MB). Free memory was 1.5 GB in the beginning and 981.2 MB in the end (delta: 499.1 MB). Peak memory consumption was 100.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:57:47,803 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:57:47,804 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.46 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:57:47,804 INFO L168 Benchmark]: Boogie Preprocessor took 20.79 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:57:47,804 INFO L168 Benchmark]: RCFGBuilder took 292.42 ms. Allocated memory is still 1.6 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. [2018-10-03 08:57:47,804 INFO L168 Benchmark]: TraceAbstraction took 257933.00 ms. Allocated memory was 1.6 GB in the beginning and 1.2 GB in the end (delta: -399.0 MB). Free memory was 1.5 GB in the beginning and 981.2 MB in the end (delta: 478.0 MB). Peak memory consumption was 79.0 MB. Max. memory is 7.1 GB. [2018-10-03 08:57:47,807 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 0.19 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.46 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.79 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 292.42 ms. Allocated memory is still 1.6 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 257933.00 ms. Allocated memory was 1.6 GB in the beginning and 1.2 GB in the end (delta: -399.0 MB). Free memory was 1.5 GB in the beginning and 981.2 MB in the end (delta: 478.0 MB). Peak memory consumption was 79.0 MB. 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 (34states) 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, 257.8s OverallTime, 377 OverallIterations, 8 TraceHistogramMax, 133.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1508 SDtfs, 2889 SDslu, 5157 SDs, 0 SdLazy, 8755 SolverSat, 4860 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9048 GetRequests, 6157 SyntacticMatches, 0 SemanticMatches, 2891 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.0s 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: 67.3s AutomataMinimizationTime, 376 MinimizatonAttempts, 5614 StatesRemovedByMinimization, 376 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 39.6s InterpolantComputationTime, 12315 NumberOfCodeBlocks, 12315 NumberOfCodeBlocksAsserted, 2131 NumberOfCheckSat, 11562 ConstructedInterpolants, 0 QuantifiedInterpolants, 527304 SizeOfPredicates, 376 NumberOfNonLiveVariables, 15954 ConjunctsInSsa, 3266 ConjunctsInUnsatCore, 753 InterpolantComputations, 1 PerfectInterpolantSequences, 0/35060 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-0-2018-10-03_08-57-47-815.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-0-2018-10-03_08-57-47-815.csv Completed graceful shutdown